Answer:18
Step-by-step explanation: eight equals 24 hours so 75 hours equals 18
Answer:
75% of 3 days is 54 hours. 3 days is 72 hours, 72=100%, x = 75%, 72/x = 100%/75% x/72 = 75/100, x = 54.
Step-by-step explanation:
Select the correct answer.
What is the solution to this system of equations?
x-2y = 15
2x+4y=-18
OA. x = 1, y=-6
OB. X= 1, y=-7
ОС. Х 3, y= -6
OD. x= 3, y=-7
Reset
Next
Answer:
O C. x = 3, y = -6
Step-by-step explanation:
x - 2y = 152x + 4y = -18Take Equation 1 and equate to x.
x - 2y = 15x = 2y + 15Now, substitute in Equation 2.
2x + 4y = -182(2y + 15) + 4y = -184y + 30 + 4y = -188y = -48y = -6x = 15 + 2(-6)x = 3Option CAnswer:
C) x = 3, y = -6
Step-by-step explanation:
[tex]\textsf{Equation 1}:x-2y=15[/tex]
[tex]\textsf{Equation 2}:2x+4y=-18[/tex]
Rewrite Equation 1 to make x the subject:
[tex]\implies x=15+2y[/tex]
Substitute into Equation 2 and solve for y:
[tex]\implies 2(15+2y)+4y=-18[/tex]
[tex]\implies 30+4y+4y=-18[/tex]
[tex]\implies 8y=-48[/tex]
[tex]\implies y=-6[/tex]
Substitute found value of y into Equation 1 and solve for x:
[tex]\implies x-2(-6)=15[/tex]
[tex]\implies x+12=15[/tex]
[tex]\implies x=3[/tex]
Therefore, the solution to the system of equations is:
x = 3, y = -6
What is the missing statement in the proof? ∠BAC ≅ ∠DEC ∠ACD ≅ ∠ECB ∠ACB ≅ ∠ECD ∠BCA ≅ ∠DCA
It is Given that two lines segment, AC and BD bisect each other at C.
The missing statement is ∠ACB ≅ ∠ECD
What is the congruent triangle?Two triangles are said to be congruent if the length of the sides is equal, a measure of the angles are equal and they can be superimposed.
Given two lines segment, AC and BD bisect each other at C.
We have to prove that ΔACB ≅ ΔECD
In triangle ACB and ECD
AC=CE (Given)
BC=CD (Given)
so, as seen in options the angle ∠ACB ≅ ∠ECD due to vertically opposite angles
hence, the missing statement is ∠ACB ≅ ∠ECD
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Answer:
C.∠ACB ≅ ∠ECD
Step-by-step explanation:
At a store, a 26 oz box of cereal costs $6.65, and a 38 oz box of cereal costs $10.98. What is the unit price of the box that is the better deal? Round your answer to the nearest cent.
Answer:
3.75.../ $1
Step-by-step explanation:
25 ounces ÷ 6.65
6.65 dollars ÷ 6.65
=
3.759398 ounces/1 dollar
Find the perimeter of the isosceles triangle with points A (0,0); B (3,3); and C (6,0)
Answer:
3+3+6=12
Step-by-step explanation:
the sides are both3 and bottomed is 6
4 The following stem plot shows the number of text
messages that students send in one day. Draw a pie
chart that represents this data.
Number of Text Messages Students Sent in One Day
Stem
Leaves
o 37
1
0011223445 77 88 89
2 013557
Key: 10 = 10
The pie chart of the number of text messages sent by the students represents the stem plot using a circle graph
How to represent the stem plot on a pie chart?The stem plot is given as:
0 | 37
1 | 0011223445 77 88 89
2 | 013557
From the above stem plot, we have the following frequency table
SMS Frequency
0 - 9 2
10 - 19 16
20 - 29 6
Total 24
Next, we determine the relative frequency table
SMS Frequency Relative Frequency
0 - 9 2 2/24 = 8.33%
10 - 19 16 16/24 = 66.67%
20 - 29 6 6/24 = 25.0%
Total 24 100%
Next, we plot the pie chart
See attachment for the pie chart
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A golf ball is hit so that it travels a horizontal distance of 440 feet and reaches a maximum height of 190 feet. Determine a quadratic equation that models the path of the golf ball, assuming it starts at the origin. (4 points) Round the coefficient of x2 to the nearest ten-thousandths place, and round the coefficient of x to the nearest thousandths place. Using your understanding of parametric equations for projectile motion, what is the angle the ball takes off? Show your steps.
(1) A quadratic equation that models the path of the golf ball, is 16.0850t² - 110.560t - 190 = 0.
(2) The angle the ball takes off is 64.4⁰.
Equation of motion of the golf ballThe equation that models the motion of the gofl ball is calculated as follows;
Vertical motionVf² = V₀² - 2gh
at maximum height, Vf = 0
V₀² = 2gh
V₀ = √2gh
V₀ = √(2 x 32.17 x 190)
V₀ = 110.56 ft/s
Equation of motionh = V₀t - ¹/₂gt²
-190 = 110.56t - ¹/₂(32.17)t²
-190 = 110.56t - 16.0850t²
16.0850t² - 110.560t - 190 = 0
Horizontal motion440 = Vxt
Vx = 440/t
The time of motion, t is determined as follows;
16.0850t² - 110.560t + 190 = 0
a = 16.0850, b = -110.560, c = 190, solve using formula method
t = 8.3 s
Vx = 440 /8.3
Vx = 53.01 ft/s
Angle of projectiontan θ = (Vy) / (Vx)
tan θ = (110.56)/(53.01)
tan θ = 2.086
θ = tan⁻¹(2.086)
θ = 64.4⁰
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A town's yearly snowfall in inches over a 10-year period is recorded in this table.
What is the mean of the snowfall amounts?
Answer:
18.9
Step-by-step explanation:
How many possible outcomes exist when two fair coins are flipped and a three-section spinner is spun? a penny.a penny. a spinner with 3 equal sections labeled 1 through 3. 3 6 7 12
Answer:
12
Step-by-step explanation:
A cylinder has a height of $10$ and a radius of $3.$ Determine the total surface area, including the two ends, of the cylinder.
Check the picture below.
[tex]\textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=3\\ h=10 \end{cases}\implies \begin{array}{llll} SA=2\pi (3)(10+3) \\\\\\ SA=6\pi (13)\implies SA=78\pi \\\\\\ SA\approx 245.04 \end{array}[/tex]
Answer:
[tex]78\, \pi[/tex].
Step-by-step explanation:
A cylinder of height [tex]h[/tex] and radius [tex]r[/tex] could be unrolled into:
two identical circles, one for the top and one for the bottom, andone rectangle, for the side.The radius of each circle is the same as the radius of the cylinder, [tex]r[/tex].
The height of the rectangle is the same as the height of the cylinder, [tex]h[/tex].
The width of this rectangle would be [tex](2\, \pi\, r)[/tex], same as the circumferences of the two circles. The reason is that when this rectangle is rolled to build the cylinder, the top and bottom edges of the rectangle would wrap around the circumference of the two circles.
The area of each circle would be [tex]\pi\, r^{2}[/tex]. Note that there are two such circles, one at the top of the cylinder and one at the bottom.
With a height of [tex]h[/tex] and a width of [tex](2\, \pi\, r)[/tex], the area of the rectangle on the side would be [tex](2\, \pi\, r)\, h[/tex]. Add these areas up to find the total surface area of this cylinder:
[tex]\begin{aligned}& \text{(Surface Area of the Cylinder)} \\ =\; & (\text{Surface area of circle on the top}) \\ & + (\text{Surface area of circle at the bottom}) \\ & + (\text{Surface area of rectangle on the side}) \\ =\; & \pi\, r^{2} + \pi\, r^{2} + (2\, \pi\, r)\, h \\ =\; & 2\, \pi\, r^{2} + (2\, \pi\, r)\, h \end{aligned}[/tex].
For the cylinder in this question, [tex]h = 10[/tex] whereas [tex]r = 3[/tex]. The surface area of this cylinder would be:
[tex]\begin{aligned}& 2\, \pi\, r^{2} + (2\, \pi\, r) \, h \\ =\; & 2 \,\pi \times 3^{2} + (2\, \pi\times 3) \times 10 \\ =\; & 78\, \pi\end{aligned}[/tex].
(24x³y⁶)² divided by 4y²
show ur work
10x -3 = -33
please help lol
Answer:
-3
Step-by-step explanation:
10x=-33+3 isolate the variable
10x=-30 divide by 10
X=-3
x=-3
Solution:First, add 3 to both sides:10x-3=-3310x=-33+310x=-30Now, divide both sides by 10:x=-3The value of x=-3Hope it helps.
Do comment if you have any query.
The function h(x) = x2 +3 and g(x) = x2 – 6. If g(x) = h(x) + k, what is the value of k?
Answer:
g(x) = x² - 6
h(x) = x² + 3
g(x) = h(x) + k
x² - 6 = (x² + 3) + k
x² - 6 = x² + 3 + k
- x² - x²
-6 = 3 + k
- 3 - 3
-9 = k
The value of k is -9.
Step-by-step explanation:
MathPapa.com
A population of 75 foxes in a wildlife preserve quadruples in size every 15 yr. the function is y = 75 x 4^x, where x is the number of 15-yr periods, models the population growth. How many foxes will there be after 45 yr? Help asap
Answer:
4800
Step-by-step explanation:
→ Find how 15yr periods there are in 45 years
45 ÷ 15 = 3
→ Substitute this value as x into the equation
75 × 4³ = 4800
Which expression represents the volume of the prism? x(x – 2) cubic units x(x 1) cubic units x2(x – 2) cubic units x2(x 1) cubic units
The expression that represents the volume of the prism is x²(x-2).
Given side of the base =[tex]x[/tex]
So, the area of the base =[tex]x^{2}[/tex]
Given the height of the prism = [tex]x-2[/tex]
What is the volume of the prism?The volume of the prism with base area A and height h is Ah.
So, the volume of the given prism with the base area [tex]x^{2}[/tex] and height [tex](x-2)[/tex] will be:
V= [tex]x^{2} *(x-2)[/tex]
V= [tex]x^{2} (x-2)[/tex]
Hence, the expression that represents the volume of the prism is x²(x-2).
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Answer:
its C trust me
Step-by-step explanation:
Tineka has a sack that contains 7/12 lb of jellybeans. If she splits the jellybeans into 2 piles of equal weight, how much will each pile weigh?
F 3/16
H 1 1/16
G 7/24
J Not here
The weight of each of the two piles Tineka split the jellybeans in the sack to is 7/24 lb.
What is the weight of each pile?
Division is when two numbers are grouped into equal parts using another number. The sign used to denote division is ÷.
In order to determine the weight of each pile, divide the weight of the sack by 2.
Weight of each sack = 7/12 ÷ 2
7/12 x 1/2 = 7/24
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Find the lateral area of this cone.
Leave your answer in terms of a.
3 cm
+ 4cm
LA = [ ? ]7 cm2
=
T
Hint: Lateral Area of a Cone = tre
Where e = slant height
Step-by-step explanation:
For Slant Height (l)
(l)^2=(3)^2+(4)^2
Using Pythagoras Theroem,
(l)^2=9+16
(l)^2=25
l=5cm
For lateral surface area (pi*r*l)
pi*4*5
20pi cm^2
MARK ME AS BRAINLISTThe lateral area of the cone in terms of π, given that the cone has a radius of 4 cm is 20π cm²
How to determine the lateral area of the cone?First, we shall obtain the slant height of the cone. This is shown below:
Height (h) = 3 cmRadius (r) = 4 cmSlant height (L) = ?L² = r² + h²
L² = 4² + 3²
L² = 16 + 9
L² = 25
Take the square root of both side
L = √25
= 5 cm
Finally, we shall obtain the lateral area of the cone. This is shown below:
Radius (r) = 4 cmSlant height (L) = 5 cmLateral area (LA) =?LA = πrL
= π × 4 × 5
= 20π cm²
Thus, the lateral area of the cone is 20π cm²
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How many square feet of outdoor carpet will
we need for this hole?
Answer:
18
Step-by-step explanation:
If you x 12x6 the area would get you 72 you already used 6 and 12 you just times 6x3 and that gets 18. If this didnt help im sorry!
4.2 divided by 6 blank tenths divided by 6
Answer: 0.11
Step-by-step explanation:
I hope i helped TvT
rationalise 1/√7-√3
PLEASE GIVE ANSWER IT'S URGENT
[tex]\dfrac 1{\sqrt 7- \sqrt 3}\\\\\\=\dfrac{\sqrt 7 + \sqrt 3}{\left ( \sqrt 7 -\sqrt 3\right) \left( \sqrt 7 + \sqrt 3\right)}\\\\\\=\dfrac{\sqrt 7 + \sqrt 3}{\left(\sqrt 7 \right)^2 - \left(\sqrt 3 \right)^2}\\ \\\\=\dfrac{\sqrt 7 + \sqrt 3}{7-3}\\\\\\=\dfrac 14\left(\sqrt 7 + \sqrt 3\right)[/tex]
What type of triangle is defined by the following set of side lengths
10, 9, 5
Acute
Obtuse
Right
Not a triangle
Answer:
Acute
Step-by-step explanation:
Hope it helps you in your learning process.
Hello there.
Question:What type of triangle is defined by the following set of side lengths
10, 9, 5
Answer:
Acute
Step-by-step explanation:
The triangle perimeter is the sum of the lengths of its three sides.
[tex]p=a+b+c=10+9+5=24[/tex]
The semiperimeter of the triangle is half its perimeter. The semiperimeter appears in formulas for triangles to be given a separate name. the triangle inequality, the longest side length of a triangle is less than the semi perimeter.
[tex]s=\frac{p}{2} =\frac{24}{2} =12[/tex]
using Heron's formula
Heron's formula gives the area of a triangle when the length of all three sides is known.
[tex]T=\sqrt{s(s-a)(s-b)(s-c)}[/tex]
[tex]T=\sqrt{12(12-10)(12-9)(12-5)}[/tex]
[tex]T=\sqrt{504}=22.45[/tex]
There you go :) I even calculated it for you.
Hope this helps!
If you have any questions please ask.
x is directly proportional to the square of y.
.
y is directly proportional to the cube of z.
z= 2 when x = 32
Find a formula for r in terms of z.
The direct variation of x to y implies that x and y increases at the same time, and the formula of x in terms of z is [tex]x = 4z^3[/tex]
How to determine the formula for x?The direct proportion of x to y is represented as:
[tex]x\ \alpha\ y^2[/tex]
As an equation, we have:
[tex]x\ =\ ky^2[/tex]
The direct proportion of y to z is represented as:
[tex]y\ \alpha\ z^3[/tex]
As an equation, we have:
[tex]y\ =\ kz^3[/tex]
Square both sides
[tex]y^2 = k^2z^3[/tex]
Substitute [tex]y^2 = k^2z^3[/tex] in [tex]x\ =\ ky^2[/tex]
[tex]x =k^3z^3[/tex]
When z = 2, x = 32.
So, we have:
[tex]32 =k^3 * 2^3[/tex]
Evaluate
[tex]32 =k^3 * 8[/tex]
Divide both sides by 8
[tex]k^3 =4[/tex]
Substitute [tex]k^3 =4[/tex] in [tex]x =k^3z^3[/tex]
[tex]x = 4z^3[/tex]
Hence, the formula of x in terms of z is [tex]x = 4z^3[/tex]
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PLEASE HELP!!!! HURRY
Answer:
the sum of 6 and a number g
Matthew and his mom are sharing an apple pie. Matthew ate 2/3 of it and his mom ate 2/6 of it. How much more did Matthew eat than his mother
Answer:
2/6th or 1/3rd of the pie
Step-by-step explanation:
Subtract 2/6 from 2/3: convert 2/3 to 4/6. Then 4/6 less 2/6 is 2/6.
Matt ate 2/6th, or 1/3rd, more pie than did his mother.
If log_b x = 2, log_b y = 5, log_b z = 4
What's log_b (x · y)
What's log_b ( xy^2/z^2)
[tex]\text{Given that,}\\\\\log_b x =2,~~ \log_b y=5,~~ \log_b z = 4\\\\\\\log_b(x\cdot y)\\\\=\log_b x + \log_b y~~~~~~~~~~~~~~~;[\log_b(MN) = \log_b M+ \log_b N ] \\\\=2+5\\\\=7\\\\\\\log_b\left( \dfrac{xy^2}{z^2}\right)\\\\=\log_b (xy^2) - \log_b z^2~~~~~~~~~~;\left[\log_b\left(\dfrac MN \right) = \log_b M - \log_b N \right] \\\\=\log_b x +\log_b y^2 - 2\log_b z\\\\=\log_b x + 2 \log_b y - 2 \log_b z\\\\=2+2 \cdot5 - 2 \cdot 4\\\\=2+10-8\\\\=10-6\\\\=4[/tex]
They got to an altitude of 500 feet. The balloon is tethered to the ground by a cable and the angle between the ground and the cable is 53º. Find the length of the cable
Answer:
about 626.1 ft
Step-by-step explanation:
The geometry of the problem can be modeled by a right triangle. The given angle is opposite the given side, and we are asked to find the hypotenuse. The relevant trig relation is ...
Sin = Opposite/Hypotenuse
__
Solving for the hypotenuse, we get ...
Hypotenuse = Opposite/Sin
cable length = (balloon height)/sin(53°) = (500 ft)/0.79864
cable length ≈ 626.1 ft
Emma incorrectly gave the sum as 8 100 . explain what emma did incorrectly and use the model to correct her work. solve the problem in your answer.
Using the fraction model, Emma made a mistake by adding 5 and 3 to get 8/100, instead of 3/100 + 5/10 = 53/100.
What are Fractions?Fractions can be referred to as a part of a whole number.
The following are the information given that was omitted:
1 grid having 10 equal columns. 5 are shaded.
This can be expressed as a fraction, as 5/10.
Another identical grid shows, 100 squares with 3 of them shaded, which can be represented in fraction, as 3/100.
The model for the addition problem would be solved as:
3/100 + 5/10 = 53/100
Therefore, using the fraction model, Emma made a mistake by adding 5 and 3 to get 8/100, instead of 3/100 + 5/10 = 53/100.
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What other situations can you think of where you gain or lose an amount that you could use negative
numbers to talk about? What would positive and negative changes mean in those situations?
Answer:
it would mean that the anwser is positive
Step-by-step explanation:
solve for w and y
Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
w = 10√2
y = 20
Step-by-step explanation:
Sum of interior angles of a triangle = 180°
Therefore, the triangle on the left (with side length 10) is a right triangle,
since 180° - 45°- 45° = 90°
As this triangle is also an isosceles triangle (since it has 2 equal angles), then it will have 2 sides of the same length.
So the legs of the right triangle are both 10 units.
Using Pythagoras' Theorem to calculate the hypotenuse of this triangle:
⇒ 10² + 10² = c²
⇒ 200 = c²
⇒ c = √200
⇒ c = 10√2
The triangle with side w and base y is also isosceles triangle with base angles of 45°.
Therefore, the sides are equal in length.
So w = hypotenuse of the left triangle = 10√2
We know that the horizontal distance between the left base vertex and the top vertex of this triangle is 10, therefore y = 10 + 10 = 20
The distance between San Francisco and Los Angeles is about 387 miles. If Takara leaves San Francisco and travels 6 hours at an average speed of 55 miles per hour, will she reach Los Angeles? How far will she travel?
Please help me with this one to (PLEASE NO LINKS)
Yvette spins the following spinner 35 times.
A spinner with 5 equal sections labeled 1 through 5.
How many times should she expect it to land on 4?
Enter your answer as a number, like this: 42
Answer:
7
Step-by-step explanation:
because if you spinned it , it has a 1/5 chance, if we divide 35 by 5 we can see its 7 meaning she could exect a average of 7 spins.