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denpristay [2]
3 years ago
7

I help with this with this work and can someone help my son with it

Mathematics
1 answer:
rodikova [14]3 years ago
3 0
2x5.4x4.5x4.2x5.3x3. 5.5x3
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–12.3 – 14.2 <br><br> A. 0.9 <br> B. 26.5 <br> C. –0.9 <br> D. –26.5
IrinaK [193]

Answer:

-26.5

Step-by-step explanation:

-12.3 - 14.2 =

in addition or subtraction, if the signs are alike, u add them and keep the same sign

so, -12.3 - 14.2 = - 26.5

but dont get this rule confused with multiplying or dividing...because those have different rules

3 0
3 years ago
Jocelyn is training for a race by running several miles each day. she tracks her progress by recording her average speed in minu
Luden [163]

Finding the regression equation, her average speed on the 9th day should be expected to be of 6.92 minutes per mile.

<h3>How to find the equation of linear regression using a calculator?</h3>

To find the equation, we need to insert the points (x,y) in the calculator.

Researching the problem on the internet, the values of x and y are given as follows:

  • Values of x: 1, 2, 3, 4, 5, 6.
  • Values of y: 8.2, 8.1, 7.5, 7.8, 7.4, 7.5.

Hence, using a calculator, the equation for the average minutes per mile after t days is given by:

V(t) = -0.15143t + 8.28

Hence, for the 9th day, t = 9, hence the estimate is:

V(9) = -0.15143(9) + 8.28 = 6.92 minutes per mile.

More can be learned about regression equations at brainly.com/question/25987747

#SPJ1

4 0
1 year ago
WILL MARK BRAINLIST PLSS HELP
mario62 [17]

1.)A   2.)B.  3.)C.  4.)C.   5.)B

I think the only one i might of gotten wrong is 4. if any are wrong. please let me know for future reference.

~ItsOniiSama ❤

Hope this helps! If so please ,mark brainliest!

8 0
3 years ago
Read 2 more answers
I WILL MARK BRAINLIST <br> Which problem can be solved by performing this multiplication? 3/4×8/9
Lana71 [14]
The answer is 4/9

Have a great day!!
3 0
3 years ago
Eleven subtracted from the quotient of a number and five is -13
madam [21]
X/5 - 11 = -13

x/5 - 11 (+11) = -13 (+11)

x/5 = -2

x/5 (5) = -2(5)

x = -10

-10 is your number

hope this helps
5 0
3 years ago
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