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2 years ago

Please help me with 20 through 22 please I really appreciate it! Thank you very much!

Mathematics

1 answer:

Ivahew [28]2 years ago

6 0

Answer:

20. 2x+y

21. 4

22. x+y

Step-by-step explanation:

20. 9x+2y - x-2y find your LCM

4 4

=(9x+2y)-(x-2y) clear bracket

4

=9x+2y-x+2y collect terms

=9x-x+2y+2y

4

=8x+4y factorize

4

=4(2x+y)

4

=2x+y

with this, you will understand the following

21. 4x + 8y

x+2y x+2y

=4x+8y

x+2y

=4(x+2y)

x+2y

22. 2x-y + 2x+5y

4 4

=2x-y+2x+5y

=4x+4y

=4(x+y)

=x+y

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3 years ago

How do I determin the slop of a line on a graph

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3 years ago

HI ME AGAIN I WOULD APPRECIATE IF YOU CAN HELP

alisha [4.7K]

Answer:

75 students were surveyed!

Step-by-step explanation:

strawberry: 25

coffe: 35

vanilla: 10

fudge ripple: 5

Just add that all together

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so 75

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3 years ago

I don't know how to do this Y=x-7 3x-3y=21

lora16 [44]

You're going to use the substitution method for this.

First, we know that Y = x-7, so we can plug x-7 into everywhere we see Y!

3x - 3(x - 7) = 21

then we simplify

3x - 3x + 21 = 21
^ ^
These cancel out!
So we're left with...

21 = 21

That means that the solution to this equation is all real numbers!

7 0

3 years ago

A Iine passes through the point (9,-8) and has a slope of

baherus [9]

Answer:

y = 2/3x + b

(Find b first with the steps below)

Step-by-step explanation:

The equation is y = mx + b and m is the slope. You were already given the slope and you were even given a point. All you have to do is graph the point and use the slope until it intercepts the y-axis.

Plot the point (9,-8)
Go up 2, left 3 spots until the line hits the y-axis (the vertical one)
That point is what b will be equal to in y = mx + b

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4 years ago