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Maksim231197 [3]
3 years ago
12

Algebra 1 distributive property. -(3b-15)=6(2b+5)

Mathematics
1 answer:
bearhunter [10]3 years ago
3 0
I'm gonna write it like this (each line is a different step) -1(3b-15)=6(2b+5) -3b+15 = 12b+30 -15b+15 = 30 -15b = 15 b = -1
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Bill stood outside the mall and asked every fourth person to enter the mall for their favorite sport. There were four choices: f
iren [92.7K]
I think the answer is c because Bill is surveying every fourth person who enters the mall, which would be the population surveyed. Hope I helped! (Let me know if I got it wrong)
7 0
3 years ago
One number is 2 more than 3 times another. their sum is 22. find the numbers
scoray [572]
1st number = x, 2nd number = y
Translating the question mathematically it becomes:
x-2 = 3y, or to make it easier: x= 3y+2, x+y= 22

Thus:
(3y + 2) + y = 22 
4y + 2 = 22

Move the 2 on the other side, changing its sign to negative:
4y = 22 - 2
4y = 20

Divide by 4, to obtain only y:
4y : 4 = 20 : 4
y = 5

To obtain x:
x= (3*5) + 2= 15+2 = 17

Verify it: 17+5=22

7 0
3 years ago
A full glass of water can hold 1/6 of a bottle.
uysha [10]

Answer:

21 glasses of water.

Step-by-step explanation:

You can do a proportion.

\fraction{1 glass}{1/6 of a bottle) or

1 glass/1/6 of a bottle.

x glasses/3.5 bottles.

You can cross multiply.

1/6 times x is 1/6x

1 times 3.5 is 3.5/

1/6x=3.5.

do the reciprocal of 1/6 which is 6.

So, 6 times 3.5 is 21.

Therefore, you have 21 glasses of water.

4 0
4 years ago
A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D
Alika [10]
The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b. 

So that means the side lengths are <u />a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

(y\times a)\times (y\times b)=9x
y^2ab=9x
y^2x=9x
y=3

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is 5 \times 8=40

And so then x=40

And then after the dilation, it would be 9x=9(40) = 360

We could check it another way too. Since we said the scale factor is 3, then:

( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360

So basically 15 by 24 is the new dimensions :)

6 0
3 years ago
Hi pls answer. it’s being timed
lbvjy [14]

Step-by-step explanation:

option a and option d ,

since highest degree of variable x is 2 in both cases

8 0
3 years ago
Read 2 more answers
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