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3 years ago

Solve the equation: 3/5r + 4 = 7

1 answer:

6 0

First we start by subtracting 4 from both sides
3/5r = 3
times both sides by the reciprocal of 3/5 which is 5/3
r = 5

To check 3/5 (5) + 4 ?= 7
3 + 4 ?= 7
7 = 7

Hope this helps :)

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5. The 7th grade has 386 students. There are 32 more girls than boys in the grade.

timama [110]

Answer:

161 boys

Step-by-step explanation:

First you find the even amount of boys and girls out of 386

386 divided by 2 = 193

Then you subtract 32 boys and add the 32 to girls since there are 32 more girls than boys

(boys) 193 - 32 = 161

(girls) 193 + 32 = 225

So there are 161 boys and 225 girls

7 0

3 years ago

When 2-(7g-3) =-9 is solved, the result is:

tresset_1 [31]

The answer is A. 2

Step-by-step explanation:

First let's simplify both sides of the equation

Now using the Subtraction Property of Equality subtract 5 from both sides

$-7g+5-5=-9-5-7g=-14$

Now using the Division Property of Equality divide both sides by -7

8 0

3 years ago

A 50-gallon rain barrel is filled to capacity. It drains at a rate of 10 gallons per minute. Write an equation to show how much

makvit [3.9K]

Answer:

The quantity of water drain after x min is 50 $(0.9)^{x}$

Step-by-step explanation:

Given as :

Total capacity of rain barrel = 50 gallon

The rate of drain = 10 gallon per minutes

Let The quantity of water drain after x min = y

Now, according to question

The quantity of water drain after x min = Initial quantity of water × $(1-\dfrac{\textrm rate}{100})^{\textrm time}$

I.e The quantity of water drain after x min = 50 gallon × $(1-\dfrac{\textrm 10}{100})^{\textrm x}$

or, The quantity of water drain after x min = 50 gallon × $(0.9)^{x}$

Hence the quantity of water drain after x min is 50 $(0.9)^{x}$ Answer

4 0

3 years ago

Read 2 more answers

Steve, Mark, Melissa, Joe,

olga2289 [7]

Step-by-step explanation:

there are 2 girls

total of 5 people

probability is 2/5 which is 0.4 and 40%

5 0

4 years ago

If weight is an explanatory variable and cost is the corresponding response

Misha Larkins [42]

Answer: C. Cost

by-step explanation:

8 0

3 years ago