Hi there!
Let the unknown number be c.
Twice a number means we multiply that number by 2:
2c
Now, subtract 13:
2c-13
This expression is equal to 15:
2c-13=15
As soon as I added the equal sign, and the number than the expression is equal to, the expression turned into an equation.
Now, let's solve it for c.
2c=15+13
2c=28
c=14
Hope everything is clear :-)
PLEASE ANSWER!!!!!!!!! ❤️❤️
if sandra walked at a rate of 1/3 mile every 30 minutes. Part A. What is her rate in miles per hour? Part B. How far would she walk in 2 hours?
Answer:
these are the answers
part a. ⅔
part b. 1 ⅓
HELP DUE TODAY! Determine if the problem is done correctly AND explain your reasoning. If the problem is correct then explain the steps that were taken. If the problem is incorrect then explain what the mistake made was and what the correct solution should be.
1) Multiply the polynomials using the tabular method: (6x2 + 4x – 9)(5x + 1)
Answer:
its correct
Step-by-step explanation:
Each term of 6x^2+4x-9 is placed along the top of the table. Each term of 5x+1 is placed along the right side of the table.
We have 3 terms in 6x^2+4x-9 and 2 terms in 5x+1
So there are 3 columns and 2 rows leading to 3*2 = 6 cells total.
Each cell is filled in by multiplying the outer terms
For instance, row 1, column 1 has 6x^2*5x = (6*5)*(x^2*x) = 30x^3
The other cells are filled in the same way.
After the table is completed, you then combine like terms
20x^2 and 6x^2 is one pair which add to 26x^2
4x and -45x is another pair which add to -41x
The other terms are just added on, but not combined/simplified. This leads to the final answer shown on your paper.
Sam has a paper clip. It has a mass of 12g and a volume of 3cm .What is its density?
Answer:
4g/cm^3
Step-by-step explanation:
Solution,
Given:
Mass=12g
Volume=3cm^3
Density=?
we know that,
I) Density=Mass/volume
=12g/3cm^3
=4g/cm^3
Therefore, required answer of above question is 4g/cm^3.
give three examples of equation were ther will be no solution
Answer:
1. +3=5.
2. x = x + 1.
3. x = x + 1.
Step-by-step explanation:
Hope these are good! :) Have a nice day!
Answer:
4x +y =5
5y=x
4x=6x
Am I right?
Inez and Joel work at a store that sells
cell phones. Inez worked for 7 hours
and 23 minutes. Joel worked for
4 hours and 51 minutes. How much
longer did Inez work than Joel?
2 hours 32 minutes
12 hours 14 minutes
3 hours 28 minutes
3 hours 32 minutes
Answer:
2 hours 32 minutes
Step-by-step explanation:
Subtract.
If you could subscribe to my friend penny_pg3d on YT, that would be great! :)
I need help with these three geometry questions help pleaseeee.
3. A
4. C
5. D are the answers
1.6 hours to 0.95 hour
Answer:
1.6 minus .95 is .65 1.6 plus .96 is 2.55 and 1.6 is greater than .95 i dont know witch one you wanted answerd but theres a few answers that might help!!
Step-by-step explanation:
mark brainiest if this helped!!
Subtracting fractions
2/3 - 1/2
Answer:
4/6 - 3/6 equals 1/6
Step-by-step explanation:
Answer:
1/6
Step-by-step explanation:
2/3 - 1/2
First get a common denominator of 6
2/3 * 2/ 2= 4/6
1/2 *3/3 = 3/6
4/6 - 3/6
1/6
Jordan has 3 toy cars. Jake has 10 times as many cars as Jordan does. How many cars does Jake have?
Answer:
Jake has 30 cars
Step-by-step explanation:
3 times 10 equals 30
What is the value if the y-intercept of a line that passes through the points (3,-2) and has a slope of 4
Answer:
the y-intercept is -14
Step-by-step explanation:
To get the y intercept, you need to get the b from y = mx + b
y - y₁ = m (x - x₁)
m = 4
(x₁,y₁) = (3,-2)
y - (-2) = (4) (x - (3))
y + 2 = 4x - 12
y + 2 - 2 = 4x - 12 - 2
y = 4x - 14
y = mx + b
b = -14
Solve the following equation. Round solution to the tenths place.
89.2 = g/4
g =
Answer:
Multiply by 4 on both sides. 89.2 times 4 is 356.8. That is the answer. g = 356.8
Select all input values for which g(x)=4
Answer:9
Step-by-step explanation:
Answer:
None of the above.
Step-by-step explanation:
The answer for this is -9, but on Khan academy the choices are-
x=-6
x=4
x=7
x= There is no such input value.
This is for Khan academy! Hope this helps!
Maria is buying ping pong balls online. Website A charges $6 per box of ping pong balls, plus an $8 service charge. Website B charges $5 per box, along with a shipping and handling fee of $10. How many boxes does Maria need to buy for the cost of both websites to be the same? (8.8C)
Answer:
it is 2 boxes
Step-by-step explanation:
i hope this helped
Answer:
Impossible
Step-by-step exp
Shifting into first gear generally increases the engine speed (rpm) while decreasing the
tractor speed (mph). What would be the effect of this change?
A. Both area rate and flow rate would increase.
B. Area rate would increase, and flow rate would decrease.
C. Area rate would decrease, and flow rate would increase.
D. Both area rate and flow rate would decrease.
The effect of this change should be option D. Both area rate and flow rate would decrease.
Information regarding speed:In the case when the first gear is shifted so it increased the engine speed. While on the other hand, it reduced the tractor speed. Due to this, the area rate and the flow rate should be decreased.Learn more about the speed here: https://brainly.com/question/24772838
If m = 3 and b = 6, what is the correct equation for Line of Best Fit?
A. y = 3 – 6
B. y = 3x +6
C. y = 3x -6
D. y = 6x + 3
Answer:
B
Step-by-step explanation:
The equation is Y = mx + b so just plug in the m and the b
Answer:
the answer is b.......
Benjamin rents a storage unit that is shaped like a cube. There are 12 identical storage units in each row of the facility. If each storage unit has a volume of 125 cubic feet, what is the length of each row in the facility?
Answer:
60 Ft.
Step-by-step explanation:
125 Cubic Ft divided by 25 gets the length of a unit and that is 5. 5 times 12 is 60.
10+(-3 3/8 i need the answer
10+(3*3/8) =
10+(9/8)=
10+1.125=
11.125
Find the equation of the line that passes through the point (1,2) with a slope of 4. Plug in your values for a and b into the equation below.
y = ______x+_______
Answer:
y=4x-2
you can find the y intercept if you plot a confirmed point on a graph and follow the slope to the line.
Answer:
y = 4x - 2
Step-by-step explanation:
Since we are given the slope already, we can solve for the y-intercept using the slope, the given point, and the formula [ y = mx + b ]
y = 4x + b
2 = 4(1) + b
2 = 4 + b
-2 = b
Substitute with what we solved for into the formula.
y = 4x - 2
Best of Luck!
Jeremy drove from Portland to Miami. He determines that the expression 450x + 150 represents the distance in miles he traveled, where x is the number of days after the first day. Which statement describes correctly what the coefficient of x represents?
Answer:
The coefficient of x represents the number of miles driven each day.
Step-by-step explanation:
The coefficient of x is being multiplied by x, or the number of days. If the expression models the total distance travelled, then Jeremy drove 450 miles each day.
Find the value of x
Answer:
D is the answer
Step-by-step explanation:
-Simplify the expression. 2(-y + 9) + 8y
Answer:
first we open the brackets using two so our new expression will be -2y+ 18 + 8y collect the like terms -2 y + 8 y + 18 so your final answer will be 6 y + 18 if you have any questions regarding this just ask
What is a summary on number properties
Answer:
There are four basic properties of numbers: commutative, associative, distributive, and identity.
Step-by-step explanation:
You should be familiar with each of these. It is especially important to understand these properties once you reach advanced math such as algebra and calculus. Distributive Property.
Rosalie and Emmet are having a disagreement. Rosalie thinks a line can have a line of symmetry, while Emmet
disagrees. What do you think: can a line have a line of symmetry? Why? Explain completely.
A line totally can have a line of symmetry. while it does not have width (therefore cannot put the line of symmetry through its "width"), it does have a length like any other shape. If we take a 4 unit line, we could put the line of symmetry at the 2 unit mark.
^sorry, im rushing a bit so you might have to paraphrase !
Answer:
Rosalie is correct, a line can have a line of symmetry.
Step-by-step explanation:
If you draw a line, a line of symmetry to that line would be perpendicular to the original line. Because lines are straight, they have an infinite number of lines of symmetry.
HELPPP!!! I'LL GIVE BRAINLIEST TO CORRECT ANSWER!!
The units of the subway map below are in miles. Suppose the routes between stations are straight. Station F, not shown on the map, is 12 miles west and 3 miles north of Station A. What is the approximate distance between Station E and Station F?
The distance from Station E to Station F is approximately ___ miles. (Round to the nearest tenth as needed.)
Answer:
8.2 miles
Step-by-step explanation:
too much to type out again lol
Distance between EF is 20.09 units.
What is Distance Formula?The Distance between two points (a, b) and (c, d) is
D= √(c- a)² + (d- b)²
Given:
E= (-4,2)
F= (16,4)
Distance between EF
= √(16+ 4)² + (4- 2)²
= √400 + 4
= 20.09
learn more about Distance Formula here:
https://brainly.com/question/28618222
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What is the hypotenuse of a right triangle if the legs are each 20 inches long? Round to the nearest whole number. A. 28 B. 29 C. 30 D. 31
Answer:
The answer is A.
Step-by-step explanation:
You have to apply Pythagoras Theorem :
[tex] {c}^{2} = {a}^{2} + {b}^{2} [/tex]
[tex]let \: a = 20,b = 20[/tex]
[tex] {c}^{2} = {20}^{2} + {20}^{2} [/tex]
[tex] {c}^{2} = 800[/tex]
[tex]c = \sqrt{800} [/tex]
[tex]c = 28 \: (nearest \: whole \: no.)[/tex]
P.S (Take note):
Pythagoras Theorem can only applied in right angle triangle.
Answer:
We can find the hypotenuse by using the Pythagoras theorem/theory. The Pythagoras theorem states that,
[tex]h^{2}[/tex] = [tex]p^{2}[/tex] + [tex]b^{2}[/tex] where, h = hypotenuse, p = perpendicular, b = base
=> [tex]h^{2}[/tex] = [tex]20^{2}[/tex] + [tex]20^{2}[/tex]
=> [tex]h^{2}[/tex] = 400 + 400
=> [tex]h^{2}[/tex] = 800
=> h = [tex]\sqrt{800}[/tex]
=> h = 28.284.....
Therefore rounded to the nearest whole number, we get,
h = 28
If my answer helped, kindly mark me as the brainliest!!
Thank You!!
True or False. View the image below.
Answer:
true
Step-by-step explanation:
-9 is greater than
a. -10
b. -7
c. -6
d. -9
e. 0
please help me
Simplify:
Need help ASAP ty
Determine how many seats there would be in the 5th row
Answer:
I think there would be 12 seats
Step-by-step explanation:
The pattern adds two each time, so you can look at the last row and add two. 10+2=12
A class has 27 students. Fifteen are boys and the rest are girls. What is the ratio of girls to total students?
Answer:
4 : 9
Step-by-step explanation:
Girls = 27 - 15 = 12
=> The ratio of girls to total students will be: 12 : 27 or 4 : 9