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Vlad [161]
2 years ago
9

Pls alert more points​

Mathematics
1 answer:
Natasha2012 [34]2 years ago
6 0

Answer:

It is Commutative property of multiplication.

Have a good day!!

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How do you do this? Yeah
Aliun [14]

Answer:

17

Step-by-step explanation:

You have to plug -2 into every x in the function, so:

(-2)^2 - 3 (-2) + 7

4 + 6 + 7

17

7 0
3 years ago
What is the solution for x^2 +14x +15​
ololo11 [35]
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3 years ago
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Find the volume of a pyramid with a square base, where the perimeter of the
lianna [129]

Answer:

42.7\,\,cubic\,\, meters

Step-by-step explanation:

Given: Perimeter of base of a pyramid = 12.8 m

Height of the pyramid = 12.5 m

To find: volume of a pyramid

Solution:

Perimeter of base of a pyramid = 12.8 m

As base of the pyramid is a square,

12.8 = 4(side\,\,of\,\,a\,\,square)

side of a square = \frac{12.8}{4}=3.2\,\,m

Area of a square (A) = (side\,\,of\,\,a\,\,square)^2=(3.2)^2=10.24\,\,m^2

Height of the pyramid (h) = 12.5 m

Volume of the pyramid = \frac{Ah}{3}=\frac{1}{3}(10.24)(12.5)=42.7\,\,cubic \,\,meters

6 0
3 years ago
Prove the following trigonometric identities (secx+tanx)(1-sinx/cosx)=1
miss Akunina [59]

Answer:

Below.

Step-by-step explanation:

Convert  to sin's and cos's:-

(secx + tanx)(1-sinx)/cosx)

= ( 1/ cos x + sinx / cos x) * ( 1 - sin x )/ cos x)

=  (1 + sin x) / cos x) *  ( 1 - sin x ) / cos x

= (1 - sin^2 x) / cos^2 x

But 1 - sin^2 x = cos^2 x

so we have

cos^2 x / cos^2 x  which = 1.

8 0
2 years ago
Tyler spent a relaxing afternoon watching movies. He watched movies for 2 1/2 hours. His brother watched the movies for 3/4 of t
True [87]

Answer:

1 3/4

Step-by-step explanation:

Frist he turned the proper fraction into an inproper which came to be 5/2.  Then he subtracted 5/2 out of 3/4 Then after that you get 7/4 but then you make it a proper fraction you will get 1 3/4

3 0
3 years ago
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