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Arlecino [84]
2 years ago
13

7x+8y=-18-5+y=-14 system by substitution ^​

Mathematics
1 answer:
yarga [219]2 years ago
3 0

Answer:

y=5+14=19

Step-by-step explanation:

Y=5+14=19 this is the right answers

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Find the value of each variable so that the quadrilateral is a parallelogram.
Vaselesa [24]

9514 1404 393

Answer:

  x = 21

  y = 25

Step-by-step explanation:

The diagonals of a quadrilateral bisect each other, so each half of a diagonal is congruent to the other half.

  x -2 = 19

  x = 21 . . . . add 2

__

  y +1 = 26

  y = 25 . . . . subtract 1

4 0
3 years ago
Solve the given equation.<br><br> w<br> −<br> 19<br> =<br> 47
butalik [34]

Answer:

w=66

Step-by-step explanation:

w-19=47

Hey There!

So what we want to do is get the variable on one side (w) and the constant on the other

so essentially what I am saying is that we have to get rid of the -19 and to do that we have to add 19

but remember whatever we do to one side we have to do to the other

-19+19 cancels out

47+19=66

therefore

w=66

7 0
3 years ago
A student rewrote 5 (8 + 3) as
kotykmax [81]
It is D , 5 x 8 = 40, 5 x 3 = 15
7 0
2 years ago
The volume of a number cube is 27 cm^3. What is the length of each side of a cube?
Alex

Answer:

54

Step-by-step explanation:

Since it's a "cube", all sides must be equal. Therefore, the length of one side is equal to the cube root of the volume.

3√27=3

An area of one surface is equal to

3²=9

Since the area of all surfaces are equal, we can assume that the surface area of this cube is

9⋅6

, because there are 6 surfaces on a cube

9⋅6=54

Hope this helps.

7 0
3 years ago
Read 2 more answers
Shirley is going to have the exterior of her home painted Tim’s painting charges $250 plus $14 per hour colorful pens charges $2
nataly862011 [7]

It takes 32 hours for Tim’s painting to be better deal.

<u>SOLUTION: </u>

Given, Shirley is going to have the exterior of her home painted  

Tim’s painting charges \$ 250 plus \$14 per hour  

Colorful pens charges \$22 per hour  

We have to find required hours for Tim’s painting to be the better deal . Let the number hours be h.  So, Tim’s charges = colorful pens charges  

\rightarrow 250+\mathrm{h} \times 14=\mathrm{h} \times 22 \rightarrow 14 \mathrm{h}+250=22 \mathrm{h} \rightarrow 22 \mathrm{h}-14 \mathrm{h}=250 \rightarrow 8 \mathrm{h}=250 \rightarrow \mathrm{h}=31.25

Now, Let us check charges after 32 hours.

\begin{array}{l}{\text { Tim charges } \rightarrow 250+32 \times 14 \rightarrow 250+448 \rightarrow \$ 698} \\\\ {\text { His charge at } 31 \text { hours } \rightarrow 698-14 \rightarrow \$ 684} \\\\ {\text { Colorful pens charges } \rightarrow 32 \times 22 \rightarrow 704} \\\\ {\text { His charge at } 31 \text { hours } \rightarrow 704-22 \rightarrow \$ 682}\end{array}

So, at 31 hours colorful pens are economical but at 32 hours Tim painting is economical.

4 0
4 years ago
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