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larisa [96]
3 years ago
12

Evaluate each expression for g = -7 and h = 3 and match it to its value.

Mathematics
1 answer:
Leno4ka [110]3 years ago
4 0
I got 4 but i’m not 100% correct
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the area of the base of a pyramid is 18 square yards. the height of the pyramid is 5 yards what is the volume of the pyramid
nikitadnepr [17]
V=areax height
v=18x5
v=90
3 0
3 years ago
Please help me I will give you alot of points​
emmasim [6.3K]
I would say it’s 240
7 0
3 years ago
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Jaime went to the mall with $42. If he bought a T-shirt and had $18 left, how much did the T-shirt cost Jaime in dollars?
nirvana33 [79]

Answer:

$24

Step-by-step explanation:

You simply do $42-$18

=24

4 0
3 years ago
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What is the length of bc round to the nearest tenth]
GalinKa [24]

Answer:

you didn't show us the image to see bc

8 0
2 years ago
Write as a single term: cos(2x) cos(x) + sin(2x) sin(x)
GREYUIT [131]

Answer: cos(x)

Step-by-step explanation:

We have  

sin ( x + y ) = sin(x)*cos(y) + cos(x)*sin(y)   (1)   and

cos ( x + y ) = cos(x)*cos(y) - sin(x)*sin(y)  (2)

From eq. (1)

if x = y

sin ( x + x ) = sin(x)*cos(x) + cos(x)*sin(x) ⇒ sin(2x) = 2sin(x)cos(x)

From eq. 2

If x = y

cos ( x + x ) = cos(x)*cos(x) - sin(x)*sin(x)  ⇒ cos²(x) - sin²(x)

cos (2x) = cos²(x) - sin²(x)

Hence:The expression:

cos(2x) cos(x) + sin(2x) sin(x)  (3)

Subtition of sin(2x) and cos(2x)  in eq. 3

[cos²(x)-sin²(x)]*cos(x) + [(2sen(x)cos(x)]*sin(x)

and operating

cos³(x) - sin²(x)cos(x) + 2sin²(x)cos(x) = cos³(x) + sin²(x)cos(x)

cos (x) [ cos²(x) + sin²(x) ]  = cos(x)

since cos²(x) + sin²(x) = 1

8 0
3 years ago
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