3 years ago

1. Use a ratio box to solve this problem. Tammy saved nickels and

Mathematics

1 answer:

Mice21 [21]3 years ago

7 0

Answer:

245

Step-by-step explanation:

let 'c' = total coins

2/7 = 70/c

2c = 490

c = 245

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Solve the equation 1/2x+14 - 9/x+7= -6

Phoenix [80]

$\dfrac{1}{2x+14}-\dfrac{9}{x+7}=-6\ \ \ \ \ /D:x\neq-7/\\\\\dfrac{1}{2(x+7)}-\dfrac{9}{x+7}=-6\ \ \ \ |\cdot2\\\\\dfrac{1}{x+7}-\dfrac{18}{x+7}=-12\\\\\dfrac{1-18}{x+7}=-12\\\\\dfrac{-17}{x+7}=\dfrac{-12}{1}\ \ \ \ |cross\ multiply\\\\-12(x+7)=-17\cdot1\\\\-12x-84=-17\ \ \ |+84\\\\-12x=67\ \ \ |:(-12)\\\\x=-\dfrac{67}{12}$

$\text{Answer:}\ c.\ x=-\dfrac{67}{12}$

5 0

3 years ago

Read 2 more answers

A 15-foot flag pole is next to a tree. The flag pole is casting a shadow of 22.5 feet and the tree is casting a shadow that is 1

muminat

Answer:32.1428571429 feet

Step-by-step explanation:

The flag is 15 feet.

It's shadow is 10.5 feet.

15/10.5=1.4285714286.

So the flag is above mentioned times of the shadow.

And the tree's hight will be,