3 years ago

I don't know who needs to hear this but I wanted to hopefully reach out to someone.

Mathematics

1 answer:

swat323 years ago

7 0

Answer:

THANK U THIS IS SO INSPIRING !!!!!!!!!! ILY whoever is reading this

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Given equations A and B as 2/5x+y=12 and 5/2y-x=6 respectively which expression will eliminate the variable X a) 5/2A+2/5B b)5/2

frutty [35]

Answer:

C) $A+\frac{2}{5}B$

Step-by-step explanation:

Given Equations:

A) $\frac{2}{5}x+y=12$

B) $\frac{5}{2}y-x=6$

In order to eliminate $x$ we need to multiply $\frac{2}{5}$ to equation B and add it to A.

Multiplying $\frac{2}{5}$ to B.

⇒ $\frac{2}{5}\times (\frac{5}{2}y-x)=\frac{2}{5}\times 6$

⇒ $(\frac{2}{5}\times\frac{5}{2}y)-(\frac{2}{5}x)=\frac{12}{5}$

⇒ $y-\frac{2}{5}x=\frac{12}{5}$

Adding it equation A.

$\frac{2}{5}x+y=12$

+ $-\frac{2}{5}x+y=\frac{12}{5}$

We get $2y=\frac{72}{5}$

Thus $x$ is eliminated.

So, the expression used to eliminate $x$ is:

$A+\frac{2}{5}B$

4 0

3 years ago

What solid is generated when a rectangle is rotated about a line.? a)rectangular pyramid b)cylinder c) rectangular prism d) cone

dlinn [17]

I believe it is a cylinder.

8 0

3 years ago

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What is the slope of the line that passes through the points ( −8,−1) and (-12,-2)

omeli [17]

Answer:

1/4

Step-by-step explanation:

We can find the slope of a line given two points from the formula

m = (y2-y1)/(x2-x1)

= (-2--1)/(-12--8)

= (-2+1)/(-12+8)

=-1/-4

= 1/4

6 0

3 years ago

Is the relation shown in the arrow diagram<br> a function?

rewona [7]

Answer: A) Yes. Every unique input has a unique output.

In other words, each x value maps to exactly one y value, so that's why we have a function.

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3 years ago

In 2003 the population of Zimbabwe was about 12.6 million people which is 1 million more than four times the population of 1950.

Marina CMI [18]

Let x be the population in 1950. Now re-rea the problem and translate the English into math language:

12.6 Mil = 1 Mi + 4x
12.6 - 1 = 4x

4x = 11.6
x = 11.6/4
x = 2.9 Mil

4 0

3 years ago