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sertanlavr [38]
3 years ago
14

A set data has a line of best fit of y=2.5-1.5

Mathematics
1 answer:
kenny6666 [7]3 years ago
8 0
The residual is -1.5 so the answer is a
The expected value is 8.5 when you plug 4 into the equation
Residual=observed-expected=7-8.5=-1.5
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What is the value of <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx2%7D%7By1%7D" id="TexFormula1" title="\frac{x2}{y1}" alt="\fra
matrenka [14]

Answer:

80

Step-by-step explanation:

Insert the values or x and y into the expression.

\frac{20^{2} }{5} = \frac{400}{5} = 80

7 0
3 years ago
How much water should be added to a 15 gallon solution of 35% hydrogen peroxide to create an 8% solution? how many gallons would
katrin2010 [14]

15 gallons of 35% peroxide solution contains 0.35 × 15 = 5.25 gallons of hydrogen peroxide. The rest of the volume is made up of 15 - 5.25 = 9.75 gallons of water.

If we add x gallons of water to the solution, the amount of hyrdrogen peroxide in the solution stays the same, but the volume of water increases to 9.75+x gallons, and the total volume increases to 15+x gallons.

To get a concentration of 8% in this diluted solution, we add x gallons of water such that

\dfrac{5.25}{15+x} = 0.08

Solve for x.

5.25 = 0.08 (15 + x)

5.25 = 1.2 + 0.08x

0.08x = 4.05

x = 50.625

To get the desired concentration, one must add 50.625 gallons of water, and one will end up with a total volume of 65.625 gallons of solution.

7 0
2 years ago
Y = 2x + 5 for x = 1.
Alisiya [41]

Since you know the value of x, you can substitute/plug it into the equation to find the value of y:

y = 2x + 5      Plug in 1 into "x" since x = 1

y = 2(1) + 5

y = 7

When x = 1, y = 7 -->  (x, y) = (1, 7)       Your answer is #4

6 0
4 years ago
Val runs 13 laps each lap is 72 meters how many meters does val run show your work
taurus [48]
This is pretty simple. 72 x 13 = 936
Therefor Val ran 936 meters.
__________________________
I hope this helps
4 0
4 years ago
Read 2 more answers
Can you guys pls help me out
Licemer1 [7]

It’s 60000

Since 2000000 divided by 3% equals 6.666,666 take the six at the beginning and add four zeros

3 0
3 years ago
Read 2 more answers
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