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stepan [7]
3 years ago
5

Can someone please help? what is the missing length?

Mathematics
1 answer:
Harrizon [31]3 years ago
8 0
31

since A = 1/2 b h, and the A is 279 and the height is 18, we can plug them in and solve for b.
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a gardenner is designing a new garden in the shape of a trapezoing she wants the short base to be twice the height and loger bas
taurus [48]

Answer:

Height = 5 ft

Short base = 10 ft

Long base = 14 ft

Step-by-step explanation:

Let h = height, a = short base, b = long base.

From the question,

a = 2h

b = a + 4 = 2h + 4

The area of the trapezoid is given by \frac{1}{2}(a+b)h. Thus,

60 = \frac{1}{2}(2h + 2h + 4)h

60 = \frac{(4h  + 4)h }{2}

60 = \frac{4h(h  + 1)}{2}

60 = 2h(h  + 1)

30 = h(h  + 1)

0 = h^2  + h - 30

0 = (h+6)(h-5)

h-5 = 0 or h+6 = 0

h= 5 or h = -6

We discard the negative value of h since it is a measurement and cannot be negative.

h= 5

a= 2h=2\times5=10

b= a+4=10+4=14

6 0
3 years ago
Help Please I really Need it on a Timer
masha68 [24]

Answer:

its A

Step-by-step explanation:

5 0
3 years ago
ere is a picture of a cube and the net for this cube. What is the surface area of this cube? A. 1,350 mm2 B. 450 mm2 C. 225 mm2
lord [1]
Hello!

To find the surface area of a cube you do 6a^{2} where "a" is the length of one of the sides.

So 6 *15^{2} = 1350

the answer is 1350mm^{2}

Hope this helps!
8 0
3 years ago
If r = −6, s = −2, and t = −3 then evaluate –t(r – s).
nekit [7.7K]
3(-6+2)
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12
;( the correct
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3 years ago
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Answer:

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