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2 years ago

Simplify the expression: 2m + 4m - 8

Mathematics

2 answers:

kati45 [8]2 years ago

8 0

Answer:

Step-by-step explanation:21

e-lub [12.9K]2 years ago

3 0

2m + 4m - 8

don't need to do combine the like terms

Add first

2m+4m=6m

6m-8

Answer: 6m-8 or -8+6m

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Esmerelda is five times as old as Ruth. Four years ago, the sum of their ages was 22 years. How old is each now?

Lina20 [59]

Answer:

Ruth is x+4=7/3+4, esmerelda is 5x+4=35/3+4

Step-by-step explanation:

if Ruth is x, esmerelda is 5x,

four years ago,

Ruth is x+4, esmerelda is 5x+4, depend on the sum, we get:

x+4+5x+4=22, x=7/3

so:

Ruth is x+4=7/3+4, esmerelda is 5x+4=35/3+4

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3 years ago

What is the expression of (0.2)(14)

Natalija [7]

The expression is 2.8

5 0

2 years ago

2.3,2 4/5, 2.6 from least to greatest

Alex777 [14]

Hello there!

Least to greatest of these problem

For the fractions you can simplify it make it easier for you to solve these types of problems

Anyhow!

Let's find our answer, shall we?

$2.3 = 2.3 \\ \\ 2\frac{4}{5} = \frac{14}{5} = 2.8 \\ \\ 2.6 = 2.6$

Our answer: $2.3 \\ 2.6 \\ 2\frac{4}{5}$

4 0

3 years ago

A ball is dropped from a height of 64 feet. Its height, in feet, can be modeled by the function h(t) = -167 + 64, where t is the

Oliga [24]

Answer:

Step-by-step explanation:

Known facts:

the ball dropped from a height of 64 feet
function $h(t) = -16t^{2} + 64$

First question:

the ball hits the ground when h(t) = 0, thus we get the equation

$-16t^{2} +64 = 0\\16t^{2} = 64\\t^{2} =4\\t = 2$

So the ball hits the ground in 2s

Second question

to find how long it takes the ball to fall 36 feet, we must set h(t) = 64 - 36 = 28

$-16t^{2} +64 = 28\\16t^{2} = 36\\t = \frac{6}{4} =1.5s$

So the ball hits the ground in 1.5s

Hope that helps!

3 0

2 years ago

For which values of P and Q does the following equation have Infinity many solutions? P×+57=-75x+Q

Semenov [28]

earrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

p*x+57-(-75*x+q)=0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

Unless there is none then in that case there very well may be infinite solutions

7 0

3 years ago