Answer:
13
Step-by-step explanation:
you use the system of equations...
:)
Help me pls
[tex]{ x }^{ 2 } -7x+12[/tex]
Answer:
x is 3 or 4
Step-by-step explanation:
I assume that you want to find the solutions for this quadratic equationFirst of all, set it all to equal 0[tex]x^{2}-7x+12=0[/tex]Now you need to factorise your expressionYou need to find two numbers that multiply together to make 12, and ad together to make -7These two numbers are -3 and -4Your new equation is:[tex](x-3)(x-4)=0[/tex]For this equation to equal 0, just one of x - 6 and x - 1 has to equal 0For x - 3 to equal 0, x has to be 3For x - 4 to equal 0, x has to be 4x = 3 or 4Jogging burns 375 calories in 45 minutes. Determine how many calories are burned per hour.
Answer:
500 calories an hour are burnt.
Step-by-step explanation:
45 is 3/4 of 60, so 375 is 3/4 of an hour of jogging. If we divide 375 by 3 we will get how many calories are burnt every 1/4 of an hour.
375 / 3 = 125
Now that we know what 1/4 of an hour equals we can add 125, 4 times to find the number of burnt calories in an hour of running.
125 + 125 + 125 + 125 = 500
that means jogging burns 500 calories an hour.
Find the DIAMETER of a circle for the circumference given.
circumference = 87 km
A) 4 km
C) 12 km
B) 10 km
D) 8 km
Circumference=87km
Diameter be d
πd=Circumferenceπd=87d=87/πd=27.71kmEduardo has a recipe that uses 2/3 cup of flour for each batch. If he makes 4 batches, how many cups of flour will he need? How many cups of flour will he need in total if he makes 3 more batches?
Answer:
4 batches: [tex]2\frac{2}{3}[/tex] cups
7 batches: [tex]4\frac{2}{3}[/tex] cups
Step-by-step explanation:
If he uses 2/3 cup of flour for each batch, then that is 2/3 four times, or 2/3 · 4.
[tex]\frac{2}{3}[/tex] × [tex]\frac{4}{1}[/tex]
= [tex]\frac{8}{3}[/tex] = [tex]2\frac{2}{3}[/tex]
If he makes three more, than that will be 7 batches in total. We can multiply 2/3 by 3 to find out how much will be needed for those extra three, then add that product to [tex]2\frac{2}{3}[/tex].
[tex]\frac{2}{3}[/tex] × [tex]\frac{3}{1}[/tex]
= [tex]\frac{6}{3}[/tex] = 2
[tex]2\frac{2}{3} +2[/tex] = [tex]4\frac{2}{3}[/tex]
Thus, [tex]2\frac{2}{3}[/tex] and [tex]4\frac{2}{3}[/tex] are the answers.
hope this helps!
Liz is taking guitar lessons and practices every night. Yesterday, she played a total of 40 chords in 8 minutes. Today, she will play chords for 5 minutes.
If she plays at the same rate, how many chords will Liz play today?
Answer:
25
Step-by-step explanation:
If you divide by eight, it is equivalent to five cords per minutes.
Now you know that she plays five cords per minute, right?
So you want to multiply five by five, because she plays a total of five minutes.
what is the system solution to 8x + 7y = 39
Answer:
-8/7
Step-by-step explanation:
I thinks this is the answer
PLEASEEE HELP !!
Matching equations with diagrams & finding unknown ancies
is on line WY. Find the value of b.
Which equation(s) and angemeurerents go with the
diagram. Choose ALL that apply
(Select all that apply.)
Answer: b+95+34=180, b+129=180, 51
Step-by-step explanation:
b+95+34=180 works because the angles add to form a straight angle.
From this, we can obtain b+129=180 by adding the two constants.
Subtracting 129 from both sides, we get b=51.
Claudio noticed that the sides of his $1 bill formed angles. Tell whether the angles are right angles, less than right angles, or greater than right angles. Explain.
(no picture to insert)
There is a leak in a container that holds a certain nontoxic gas. Each hour, it loses 10% of its volume.
Write an equation that models the amount of gas left in the container after x hours, assuming there were 300 cubic centimeters in the container before the leak. Then use your equation to determine the amount of gas left in the container after 11 hours. Round your answer to the nearest tenth.
Answer:
94.1 cm^3 to nearest tenth.
Step-by-step explanation:
Each hour 100 - 10 = 90% of the gas remains.
90% = 0.90.
At 0 hours the volume = 300 cm^3
The equation is
Amount (V) after x hours = 300(0.90)^x.
The amount after 11 hours:
V = 300(0.90)^11
= 94.14
Answer:
y = 300(0.9)^x
94.1 cm³
Step-by-step explanation:
This is an exponential decay.
y = 300(0.9)^x
where x is the number of hours, and y is the amount after x hours.
y = 300(0.9)^11
y = 94.1
Consider the two solids shown.
What is the difference between the number of vertices of the two solids?
one
three
four
six
Look at this set of ordered pairs:
(8,8)
(8, 12)
(17, -12)
Is this relation a function?
Can someone please help me? :(
Answer:
A) 2, 4, 0, 2, 4, 6, 3, 0, 7, 1, 2, 7, 8, 1, 1
Step-by-step explanation:
B says that 5 is marked but 5 is not marked on the number line
C has three 0s and there are only two 0s.
D has less numbers so that one isn't it.
hope this helped!
brainliest please!
~Kandy~
find value of variable
Answer:
x = 23.5
Step-by-step explanation:
By inscribed angle theorem:
[tex](2x + 1) \degree = \frac{1}{2} \times 96 \degree \\ \\ \implies \: (2x + 1) \degree = 48 \degree \\ \\ \implies \: 2x + 1 = 48 \\ \\ \implies \: 2x = 48 - 1\\ \\ \implies \: 2x = 47\\ \\ \implies \: x = \frac{47}{2} \\ \\ \implies \: x = 23.5[/tex]
The radius of a circle is 4 m. Find its area to the nearest whole number.
Answer:
16π or around 50.26
Step-by-step explanation:
A=πr²
A=π(4)²
A=16π
A=16(3.1415926)
A=50.26
1) For what values is the statement true? sin(x+20)°=cos(y−10
x=20, y=60
x=20, y=50
x=30, y=40
x=30, y=60
2)In right triangle ABC with right angle C, sinA=4/5 and cosA=3/5. What is sinB+cosB?
1/5
7/5
35/12
5/7
3)In a right triangle ABC where sinA=cosB, what are the measures of acute angles A and B if the measure of angle A is three times the measure of angle B?
The measure of angle A is 67. 5° and the measure of angle B is 22. 5°.
The measure of angle B is 135° and the measure of angle A is 45°.
The measure of angle A is 135° and the measure of angle B is 45°.
The measure of angle B is 67. 5° and the measure of angle A is 22. 5°.
4)What is the value of b that makes the equation cos(17b+26)°=sin(15b)° true?
13
2
9. 5
3
Answer:
1) X =20° ,Y=60°
2) 7/5
3) first is correct
4) 2
For large parties A restaurant adds a 15% service charge to the bill how much would be added to a bill of 638. 40
Answer:
95.76$
Step-by-step explanation:
Calculate 15% of 638.40$
we have 15%/100% x 638.40
which is 95.76$
It means that a charge of 95.76$ will be added to an amount of 638.40$
The diagonal of a rectangle is 12 in and intersect at an angle to make a 60 degree angle. Find the perimeter of the rectangle
The perimeter of the rectangle whose diagonal is 12in and intersects at an angle to make a 60 degree angle is; 32.8in.
What is the perimeter of the rectangle?The rectangle as described above has it's Diagonals intersect at their midpoints, i.e at length = 6in.
On this note, the right angle triangles formed each have other two sides to be;
x = 6 sin 60 and y = 6 Cos 60 respectively.From the statement above, the values of x and y are 5.2 and 3.
Hence, the perimeter of the rectangle is;
2(2x + 2y) = 32.8 inches.Read more on perimeter of a rectangle;
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Select all of the equations that are equivalent to 4x+20=90
1. 4(x+5)=90
2. x+5=22.5
3. 4(x+20)=90
4. x+20=22.5
5. 4x=70
pls pls tell me
Answer:
The answer is num 1 I think, 4(x+5)=90
36 A community center is collecting blankets. The director of the center has asked 135 families
to donate 3 blankets each. If 20% to 40% of the families donate 3 blankets each, which of
these could be the number of blankets the center collects from these families?
F 240
G 50
H 110
J 170
Answer: H is between 81 And 162
Step-by-step explanation: 20/100 ×135/1 = 27 FamilieFamilies with 81 Blankets
40/100 × 135/1 = 54 families with 162 Blankets
Is the following number rational or irrational?
-2π
Choose 1 answer:
А
Rational
00
B
Irrational
Answer:
B, Irrational number
Step-by-step explanation:
Irrational number because
[tex]\pi[/tex]
is Irrational number
The following table represents the highest educational attainment of all adult residents in a certain town. If a resident who is 40 or older is chosen at random, what is the probability that they have completed a bachelor's degree and no more? Round your answer to the nearest thousandth.
Using it's concept, it is found that there is a 0.183 = 18.3% probability that the person has completed a bachelor's degree and no more.
What is a probability?A probability is given by the number of desired outcomes divided by the number of total outcomes.
Researching this problem on the internet, it is found that 529 + 1054 = 1583 out of 1911 + 6730 = 8641 people aged 40 or older have completed a bachelor's degree and no more, hence the probability is given by:
p = 1583/8641 = 0.183.
More can be learned about probabilities at https://brainly.com/question/14398287
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pls help me with this
© There are 5 times as many females as males on the maths course at university. What fraction
of the course are female?
Give your answer in its simplest form.
Answer: 5/6
Step-by-step explanation: Females are 5 times more
Ratio of female to male will be 5:1
Female will be 5/6 and males will be 1/6
Make r the subject of the formula t = r/r-3
Answer:
Infinite/(-∞, ∞)
Step-by-step explanation:
I need food to live, but if I eat dirt, I die. I am all-powerful, but I shrink back at the sight of water. What am I?
Answer:
Fire?
Step-by-step explanation:
fire would need and not need all of these things
Answer:
Fire.
Step-by-step explanation:
It has to be fire?
8x-1<2x+5
If x is a number greater than zero that satisfies the inequality above, what is one possible value of x?
Step-by-step explanation:
There is no number greater than zero that satisfy the above inequality
but if the sign is less than or equal to 1 will work
Answer:
0 < x < 1
any fraction bigger than zero and less than 1.
Step-by-step explanation:
8x - 1 < 2x + 5
Subtract 2x
6x - 1 < 5
Add 1.
6x < 6
Divide by 6.
x < 1
They are asking for a number bigger than zero. But 1 does not work because the answer has to be less than one. Pick any fraction between zero and one.
5. Find the length of the highlighted arc from A to B
Answer: 9.4 cm
Step-by-step explanation:
formula is
2 pie r (m/360)
A box has 26 pens —6 red, 8 green, 5 blue, and 7 black. Sam picks two pens at a time without replacement. What is the probability that Sam picks two blue pens?
Answer:
2/65
Step-by-step explanation:
trust me
The probability that Sam picks two blue pens is,
⇒ 5 / 26
What is mean by Probability?The term probability refers to the likelihood of an event occurring. Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one.
Given that;
A box has 26 pens —6 red, 8 green, 5 blue, and 7 black.
Here, Sam picks two pens at a time without replacement.
Hence, We get;
The probability that Sam picks two blue pens is,
⇒ P = 5 / 26
Thus, The probability that Sam picks two blue pens is,
⇒ 5 / 26
\
Learn more about the probability visit:
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Bobby is making bread using a total of 400 grams of gluten free flour. The recipe calls for 70% of the flour to be almond flour. She needs to know how much almond flour to use
280 grams of almond flour.
She needs 70% of the flour to be almond flour
70/100*400 = 280
can somebody help me and explain how to do this
Answer:
=> 24m²
Step-by-step explanation:
Area of small rectangle = l×b
=> 2m× 3m
=> 6m²
Area of large rectangle = L×B
=> 9m × 2m
=> 18 m²
Area of figure = area of small rectangle + area of large rectangle
=> 18 m² + 6m ²
=> 24m²