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Elan Coil [88]
2 years ago
5

Please help me

Mathematics
1 answer:
WITCHER [35]2 years ago
5 0

Answer:

Yes, Rain is correct

238.5 square inches

Step-by-step explanation:

Surface Area of a Triangular Pyramid,A = 1/2(a × b) + 3(1/2 × b × s)

= (1/2 × 10 × 8.7) + 3(1/2 × 10 × 13)

= 43.5 + 3(65)

= 43.5 + 195

= 238.5 square inches

The surface area of the triangular pyramid = 238.5 square inches

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dedylja [7]

4 divided by 3 = a whole and 3 repeated more than 4 times

(to use the number 4)

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8 0
2 years ago
3x - 2y + 3z = -20<br> 4x - 3y - 2z = 7<br> -5x + 5y + z = 9
skelet666 [1.2K]

Answer:

x= 4 y= 7 z= -6

Step-by-step explanation:

solve for one and you get them all

First, I got rid of the z by multiplying common factors (multiplied z by 2) and added equations 2 and 3 together after multiplying by 2

4x - 3y - 2z = 7

-10x+10y+2z= 18

-6x+7y= 25

Then multiplied z by -3 (to get rid of the z) with the original equation 3

3x - 2y + 3z = -20

15x-15y-3z= -27

18x-17y= -47

Next find common thing between the 2 equations we got and multiply it by that and combine (we can multiply first equation by 3 to get rid of the x and solve for y)

-18x+21y= 75

18x-17y= -47

y=7

Work backwards, substitute 7 into the above equation, you get x= 4 and then same for z to get z= -6

8 0
3 years ago
If f(x)= x+7 and g(x)= 1/x-13
Natasha2012 [34]
1. x = y - 7
2. g = x12
4 0
3 years ago
05.02 MC)
Natalka [10]

Add the two bases together, divide by 2 then multiply by the height.

8+6 = 14

14/2 = 7

7x5 = 35

The area is 35 square Feet

4 0
3 years ago
A hose fills a hot tub at a rate of 4.26 gallons per minute. How many hours will it take to fill a 265-gallon hot tub?
Studentka2010 [4]

Answer: Divide the volume of the bath tub by the rate at which the hose folks the bath tub

 

Time = 251/ 4.86

 

= 51.64 hours

Step-by-step explanation:

7 0
3 years ago
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