MATHEMATICS HIGH SCHOOL

1/2x +31/2y=
Please help I have only till 3 pm

Answers

Answer 1
Answer:

Answer: (x)/(2) + (31y)/(2)

Step-by-step explanation:

1) Combine multiplied terms into a single fraction.

(1)/(2) x + (31)/(2) ⋅ y

2) Multiply the equation by 1.

1x/2+ 31/2 ⋅ y

x/2 + 31/2 ⋅ y

3) Combine multiplied terms into a single fraction.

x/2 + 31/2 y

x/2 + 31y/2

4) Solution

x/2 + 31y/2

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2x - 2 = 12???????????????

3D shape practice. I'm stuck in this problem. Pleas help.

Answers

1)we calculate the volume of the right rectangular prism
volume=lenght x width x heigth
volume=12 ft * 8.5 ft * 4 ft=408 ft³

density= mass / volume  ⇒ mass=volume * density.
density=0.25 pound /ft³

2) we calculate the mass of the right rectangular prism.
mass=volume * density
mass=408 ft³(0.25 pound / ft³)=102 pounds.

answer: c.  102

 

How is net worth calculated

Answers

net worth is what is owned minus what is owed
 Net worth is what is owned minus what is owed.

In your own words, explain the
term midpoint.

Answers

Ok in my own words hmm.

Midpoint to me would be the point in the middle.

I've seen and worked with midpoints on lines and triangles.

So the midpoint would be the point in the middle of a line segment.

Hope this is helpful!

Answer:

It's the center of a line which involves coordinates (x,y) and by defining a line it's made up of multiple coordinates

Step-by-step explanation:

Hope it's helpful

what is the approximate volume of a tree trunk if the trunk is 13 feet tall with a circumference of 4.5 feet

Answers

Answer:

V=21.17³

Step-by-step explanation:

c=2πr

4.5=2(3.14)r

4.5/6.28=6.28r

6.28s cancel each other out

7.16=r

round

V=πr²h

V=21.17³
Volume of a cylinder is \pi r^(2) h
C = \pi 2r
4.5/2\pi = r
0.7162 = r
\pi r^(2) 13 = 20.91

If a given data point is (1,4) and the line of best fit is y = 1.5x + 3.25, what's the residual value?

Answers

Answer:

The residual value is -0.75

Step-by-step explanation:

we know that  

The residual value is the observed value minus the predicted value.

RESIDUAL VALUE=[OBSERVED VALUE-PREDICTED VALUE]

where

Predicted value.--> the predicted value given the current regression equation

Observed value. --> The observed value for the dependent variable.

in this problem

we have the point (1,4)

so

The observed value is 4

Find the predicted value  for x=1

y =1.5(1)+3.25=4.75

predicted value is 4.75

so

RESIDUAL VALUE=(4-4.75)=-0.75

Answer:

-0.75

Step-by-step explanation:

If a store uses a selling price-based markup of 40% and an item costs the store $300, what selling price would the store set for the item?

Answers

The store sells a product for 40% more than the what they buy it for.
40% is 0.40 in decimal because all percents are out of 100 (divide by 100)
300×(1+0.40)=$420
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