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Oksanka [162]
2 years ago
15

PLZ HELP ME MY MOM WILL TAKE AWAY MY PHONE

Mathematics
2 answers:
agasfer [191]2 years ago
8 0

Answer:

19

Step-by-step explanation:

5² - (2.1 + 7.4) + 3.5

2.1 + 7.4 = 9.5

5² - 9.5 + 3.5

5² = 25

25 - 9.5 + 3.5

25 - 9.5 = 15.5

15.5 + 3.5 = 19

Hope this helped.

tekilochka [14]2 years ago
7 0
It’s 9.8 use a calculator
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Is the relationship shown by the data linear? How can you tell if it is or is not? If so, model the data with an equation.
yuradex [85]

Hello from MrBillDoesMath!

Answer:    The relationship is linear. The equation is y = 2x + 19

Discussion:

When x changes from -7 to -5 ( and increment of of +2),  y changes from 5 to 9 ( an increment of +4). When x changes from 5 to -3 (an increment of +2) , y changes from 9 to 13 (an increment of +4)... and so on.....

So far, when x changes by 2, y changes by 4.  This means the data falls on a line (so is linear). In fact,

(change in y) /  (change in x) = 4/2 = 2 =  slope of line.

so  y = 2x + b. As the line passes through the point ( -7, 5)

5 = 2 (-7) + b    or

5 = -14 + b       or ( adding 14 to both sides)

5 + 14 = 19  = b.

Hence the equitation the line is  y = 2x + 19

Thank you,

MrB

6 0
2 years ago
Help I guess? sorry I'm asking a lot of questions today
valina [46]

Answer:

63 houses have been sold this year.

Step-by-step explanation:

There are 81 houses in the community. If 7/9 are sold this year, then all you have to do is multiplication.

In this case, you would multiply 81 by 7/9 to get your answer.

81/1 x 7/9:

Cancel out the 9 and the 81. Then the denominator will be 1 x 1 and the numerator would be 7 x 9. It would be 63 (7x9=63) over 1 (1x1=1) which is just 63. Make sure to include units.

4 0
3 years ago
Read 2 more answers
Please answer this 1 1/3-5/6
iren2701 [21]
11/3-5/6
=(22-5)/6
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6 0
2 years ago
10x+9-40.<br> How you do this
emmainna [20.7K]

Answer:

10x−31

Step-by-step explanation:

Let's simplify step-by-step.

10x+9−40

=10x+9+−40

Combine Like Terms:

=10x+9+−40

=(10x)+(9+−40)

=10x−31

Hope this helps and can you please give me brainliest ;-)

3 0
2 years ago
An 80 confidence interval for is found to be (200, 240). what is the margin of error
Bogdan [553]

Answer:

It’s 20

Step-by-step explanation:

8 0
3 years ago
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