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larisa [96]
3 years ago
5

Does anyone know this

Mathematics
1 answer:
krek1111 [17]3 years ago
4 0

Answer:

<em>a2+1)-(4+2a2) </em>

Step-by-step explanation:

<em>to solve this, we need to get rid of the brackets as follow: </em>

<em>3a2+1-4-2a2  </em>

<em>ading the common terms we have: </em>

<em>a2 - 3 </em>

<em>that is all.</em>

<em>Plz mark  me brainlist!!!</em>

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Molly works at an electronics store. Her last customer purchased a DVD player for $66.54 and five DVDs for $51.33, including tax
Masteriza [31]

Answer:

$88.20

Step-by-step explanation:

 66.54

+ 51.33

____________

$117.8

200-117.8 = 88.2

8 0
3 years ago
Find the value of the variable and GH if H is between G and I. GI=5b+2,HI=4b-5, HI=3​
gulaghasi [49]

Answer:

GH = 9 units

Step-by-step explanation:

Given HI = 4b - 5 and HI 3, then

4b - 5 = 3 ( add 5 to both sides )

4b = 8 ( divide both sides by 4 )

b = 2

Thus

GI = 5b + 2 = 5(2) + 2 = 10 + 2 = 12

GH = GI - HI = 12 - 3 = 9

4 0
3 years ago
What basic trigonometric identity would you use to verify that sin^2x +cos^2x/cos x = sec x
gogolik [260]

<u>Answer:</u>

The basic identity used is \bold{\sin ^{2} x+\cos ^{2} x=1}.

<u>Solution: </u>

In this problem some of the basic trigonometric identities are used to prove the given expression.

Let’s first take the LHS:

\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}

Step one:

The sum of squares of Sine and Cosine is 1 which is:

\sin ^{2} x+\cos ^{2} x=1

On substituting the above identity in the given expression, we get,

\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}=\frac{1}{\cos x} \rightarrow(1)

Step two:

The reciprocal of cosine is secant which is:

\cos x=\frac{1}{\sec x}

On substituting the above identity in equation (1), we get,

\Rightarrow \frac{\sin ^{2} x+\cos ^{2} x}{\cos x}=\sec x

Thus, RHS is obtained.

Using the identity \sin ^{2} x+\cos ^{2} x=1, the given expression is verified.

6 0
3 years ago
An artist wants to make alabaster pyramids using a block of alabaster with a volume of 576 cubic inches. She plans to make each
marta [7]

Answer:

144 pyramids

Step-by-step explanation:

The volume of a pyramid = 1/3*base area * height

Given: Base area = 3 sq.inches

Height = 4 inches

Volume of each pyramid = 1/3*3*4

= 4 cube inches.

To find the number pyramids can the artist make from block of alabaster artist, we need to divide 576 by 4.

= 576/4

= 144

Therefore, the artist can make 144 pyramids.

Thank you.

6 0
3 years ago
Read 2 more answers
What property is this<br> 16+(c+17)=(16+6)+17
Art [367]
Answer: Associative Property

This equation would be the associative property because you would have the ability to add or multiply these numbers, regardless of how they were grouped together
6 0
3 years ago
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