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4 years ago

Find the difference. (4y+3)-(2y-9)

Mathematics

2 answers:

Dovator [93]4 years ago

3 0

Answer:

2y +12

Step-by-step explanation:

$(4y + 3) - (2y - 9)$

Expand

$- (2y - 9) = - 2y + 9$

$4y + 3 - 2y + 9$

Group like terms and simplify

$4y - 2y + 3 + 9 \\ 2y + 12$

Yuki888 [10]4 years ago

3 0

Hey there! I'm happy to help!

First, we subtract the variables.

4y-2y=2y

And we subtract the constants.

3--9

3+9=12

So, the difference is 2y+12.

Have a wonderful day! :D

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Given the function f(x) = The quantity of 2x minus 5, divided by 3 , which of the below expressions is correct? (1 point) f−1(x)

Anuta_ua [19.1K]

Answer:

$f^{-1}(x)$ =the quantity of 3x plus 5 divided by 2

Step-by-step explanation:

We are given that a function $f(x)=\frac{2x-5}{3}$

We have to find the correct expression

Suppose y= $\frac{2x-5}{3}$

$3y=2x-5$

$3y+5=2x$

$x=\frac{3y+5}{2}$

Therefore, $f^{-1}(x)=\frac{3x+5}{2}$

Answer: $f^{-1}(x)$ =the quantity of 3x plus 5 divided by 2

8 0

4 years ago

In a certain class 40% of students are girls and 20% of the girls wear glasses what percent of the children in the class a girl

Zielflug [23.3K]

Okay.
40/100 students are girls.
20% of those 40 girls wear glasses.
So that's 20/40.
20/100

4 0

3 years ago

Explain your answer plez

tiny-mole [99]

Answer:

50°

Step-by-step explanation:

In a parallelogram, opposing angles must be equal. Note how 75° = 75°. Thus, opposing angles 2x + 5 and x + 55 must also be equal.

Solve this equation for x.

Subtracting x from both sides yields x + 5 = 55. Next: Subtracting 5 from both sides yields x = 50° (answer choice C)

8 0

3 years ago

I need help please ^^

Vaselesa [24]

Answer:

see below

Step-by-step explanation:

Usually, we're concerned about the relationship of y to x. Here, the question is asking you to consider the relationship of x to y.

The easiest way to find the answer to this one is to check the given explanations to see which is true. You can pretty much ignore the first row of the table and just look at the second row where x=5 and y=15.

it is NOT TRUE that x is 3 times y (5 is not 3 times 15)
it is TRUE that x is 1/3 of y (5 is 1/3 of 15)
it is NOT TRUE that x is 5 times y (5 is not 5 times 15)
it is NOT TRUE that x is 1/5 of y (5 is not 1/5 of 15)

_____

If you know your multiplication tables, you know that 15 = 3×5, so ...

5 = 15/3

5 = (1/3) × 15

The relationship of these numbers should not be a mystery.

4 0

3 years ago

The graph of y = –3x + 4 is:

MrRa [10]

Answer:

Step-by-step explanation:

It's a line with many solutions like

When x=1 y=1

X=2 y=-2

And so on all the pts on the line

8 0

3 years ago