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IgorC [24]
3 years ago
8

Translate to an​ equation, then solve

Mathematics
1 answer:
rjkz [21]3 years ago
4 0

Answer:

n=12

Step-by-step explanation:

13 less than 9 times a number: 13 less than 9n, 9n-13

11 more than 7 times a number: 11 more than 7n, 7n+11

9n-13=7n+11

2n=24

n=12

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Shelly biked 21 miles in 4 hours (part A) what is Shelly's average speed in miles per hour (part B) at the same rate how many ho
Alex73 [517]

A) Divide total miles by total time:

21 miles /  4 hours = 5.25 miles per hour.

B) Divide miles by miles per hour:

42 miles / 5.25 miles per hour = 8 hours.

3 0
3 years ago
The perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is , where l represents t
Gekata [30.6K]

Answer:

A. 7 in.

Step-by-step explanation:

We have been given that the perimeter of a rectangle is 16 inches. The equation that represents the perimeter of the rectangle is , where l represents the length of the rectangle and w represents the width of the rectangle.

We know that perimeter of rectangle is 2 times the sum of width and length of rectangle.

\text{Perimeter}=2(l+w)

\text{16 in}=2(l+w)

\frac{\text{16 in}}{2}=\frac{2(l+w)}{2}

\text{8 in}=l+w

To be a rectangle length cannot be 8 as length and width of the rectangle is 8 inches.

Therefore, 7 inches the possible value for the length of the rectangle.

5 0
3 years ago
Give letter answer if you give equations rewritten I will give extra points :)
Flauer [41]

Answer:

a) -3x -2y = 12

b) 10x = -15y + 60

c) 6x +9y = 18

7 0
3 years ago
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What are the roots of the equation y=x^2 -5x-24
NikAS [45]
Factor
(x-8)(x+3)

Check:
-8+3=-5
-8*3=-24

Use ZPP
x-8=0
x=8

x+3=0
x=-3

Final answer: x=-3, x=8
6 0
3 years ago
How much is two thirds
Anni [7]

Answer:

\frac{2}{3}

Step-by-step explanation:

Given an object, split it into three equal parts.  Two-thirds is two of the three pieces.

4 0
3 years ago
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