HELP! Its about systems of equations

Mathematics

1 answer:

fiasKO [112]3 years ago

5 0

Answer:

the answer would be c

Step-by-step explanation:

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(4/5÷1/3)5/8= having problem remembering the steps

Alchen [17]

You need to follow the order of operations acronym PEMDAS

ParentheseExponentMultiplyDivideAddSubtract

do the division in the Parentheses first:-
= (4/5 * 3) 5/8

= 12/5 * 5 / 8

= 12/8

= 1 1/2 <----- answer.

8 0

4 years ago

Read 2 more answers

Which expressions is equivalent to 2r+(t+r)

azamat

Answer:

t+3r

Step-by-step explanation:

This is a one step solution

All you do is add like terms

In this case the only like terms are the varibles r

2r+(t+r)

so if you add all of the rs together there would be 3rs

So the rest of the problem would continue as normal while bringing the 3r to the end

t+3r

8 0

3 years ago

The floor of a shed given on the right has an area of 85 square feet. The floor is in the shape of a rectangle whose length is 7

lesya692 [45]

Answer: Length = 10 feet and width = 8.5 feet.

Step-by-step explanation:

Let x be the width of the floor.

Then length of the floor = $2x-7$

Given : The area of the floor = 85 square feet

We know that the area of a rectangle is given by :-

$A=l\times w$

$\Rightarrow\ 85=(2x-7)\times x\\\\\Rightarrow\ 2x^2-7x-85=0\\\\\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\\Rightarrow\ x=\dfrac{7\pm\sqrt{49-4(2)(-85)}}{4}\\\\\Rightarrow\ x=\dfrac{7\pm27}{4}\\\\\Rightarrow\ x=\dfrac{17}{2}, -5$