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yuradex [85]
2 years ago
10

Pleaseeeeeeeeee help math

Mathematics
2 answers:
Crank2 years ago
8 0

Answer: 8

Step-by-step explanation: to find 20% multiply 40 by .20

Zolol [24]2 years ago
3 0
8

40*0.2 which gives u the answer 8
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A family plans to have the hardwood floors in their square dining room re-finished, and new baseboards installed. The cost of re
Alexus [3.1K]

Answer:

Dimension of room = 18 foot x 18 foot

Step-by-step explanation:

Let the square room is of side a foot,

The cost of re-finishing the hardwood floors is $2.25 per square foot and the cost of purchasing and installing the new baseboards $14.5 per linear foot

Total cost is  $1773.

Cost for re-finishing the hardwood floors = Area x 2.25

Area = a²

Cost for re-finishing the hardwood floors = 2.25 a²

Cost of purchasing and installing the new baseboards = Perimeter x 14.5

Perimeter = 4a

Cost of purchasing and installing the new baseboards = 4a x 14.5 = 58 a

Total cost = Cost for re-finishing the hardwood floors + Cost of purchasing and installing the new baseboards

1773 = 2.25 a² + 58a

2.25 a² + 58a - 1773 = 0

a = 18 or a = -43.77(not possible)

Dimension of room = 18 foot x 18 foot

7 0
4 years ago
If y=x^2+2x find the value of y when x =3
Brilliant_brown [7]
X=3 so

3^2= 9

2*3= 6

y= 9 + 6

y= 15
3 0
3 years ago
The sides of a triangle measure 7, 4 and 9. If the longest side if a similar triangle measures 36, what is the length of the sho
IrinaK [193]

Answer:

16

Step-by-step explanation:

OK, this might sound a bit confusing but I'll give it my best shot.

1. We know all the sides of one triangle, the smaller one. We know that the largest side of the large triangle is 36, and the largest side of our small triangle is 9. This means that they are related.

2. If we take 36 and divide by 9, it gives us 4. This number tells us how much bigger the large triangle is compared to the smaller triangle.

3. Now, we can take the number we just got, 4 and use it to find the other sides of the large triangle.

4. We need the smallest side of the large triangle. We can get this by taking the smallest side of the small triangle, and multiplying it by 4, since we know that the big triangle is 4 times larger than the small one.

5. 4 is the smallest side of the small triangle. We can multiply by 4, which is 16, and your answer!



6 0
3 years ago
Find the slope and the y-intercept of each line from it's equation.<br><br> 3x-y=28
Otrada [13]
<span> 
Slope = 3 
 
x-intercept = 28/3 = 9.33333<span> 

y-intercept = 28/-1 = -28.00000

Hope this helped</span></span>
7 0
3 years ago
Winter coats are marked 70% off on February 1st. If a coat originally costs $57.70, how much will it cost on sale?
Anna [14]

Answer:

40.39

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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