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wolverine [178]
3 years ago
15

Help will give brainlessly

Mathematics
1 answer:
zysi [14]3 years ago
4 0
90 for the first one

120 for the second one

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The diagram represents a reduction of a triangle by using a scale factor of 0.8.
Alekssandra [29.7K]

Answer:

4.8 inches

Step-by-step explanation:

<em>See comment for complete question</em>

Represent the larger triangle with 1 and the smaller with 2.

So, we have:

H_1 =6\ in -- height of 1

Required

Determine H2 --- Height of 2

To do this we apply dilation formula.

Original * Scale\ Factor = New

In this case:

H_1 * Scale\ Factor = H_2

Substitute 6 for H1 and 0.8 for Scale Factor

6* 0.8 = H_2

4.8= H_2

Hence, the height of the smaller triangle is 4.8 inches

3 0
3 years ago
Prove the formula sin 3 A + sin A = 4 sin A cos2A
pantera1 [17]

We proved that formula using the trigonometry relations sin3A + sinA = 4sinAcos^2A.

In the given question,

We have to prove the formula sin 3A+sin A = 4sinAcos^2A

The given expression is sin 3A+sin A = 4sinAcos^2A

To prove the formula we take the left side terms to the right side terms

The left side is sin 3A+sin A.

As we know that sin 3A = 3sinA − 4sin^3A

To solve the left side we put the value of sin 3A in sin 3A+sin A.

=sin 3A+sin A

=3sinA − 4sin^3A+sin A

Simplifying

= (3sinA+sin A) − 4sin^3A

= 4sinA − 4sin^3A

Taking 4sinA common from both terms

= 4sinA(1 − sin^2A)

As we know that cos^2A=1 − sin^2A. So

= 4sinAcos^2A

We proved the right hand side.

To learn more about formula of trigonometry terms link is here

brainly.com/question/15270423

#SPJ1

5 0
2 years ago
Solve: x^2+4x-15<br><br> you don’t need to show steps
Veseljchak [2.6K]

Answer:

-2 ± √19

Explanation:

Quadratic formula

Hope this helps!

7 0
2 years ago
Krystal was given $3000 when she turned 2 years old. Her parents
amid [387]
The expression for finding the amount of money earned on interest is

P(1+\frac{r}{n})^{nt}

where
P = principal (money you started with)
r = rate (in decimal form)
n = number of times compounded per year
t = time (in years)

In this case:
P = 3000
r = 0.02       (because 2% in decimal form is 0.02)
n = 1        (because it is compounded once every year)
t = 16       (because she got the money when she was 2 and we are calculating it                       for when she turns 18, 16 years later)

So, you plug it in:

P(1+\frac{r}{n})^{nt}\\3000(1+\frac{0.02}{1})^{(1)(16)}\\3000(1+0.02)^{16}

So, the answer is (1) <span>3000(1 + 0.02)^16</span>
7 0
3 years ago
Help me with this only number 1
stira [4]

Answer:

25

Step-by-step explanation:

You have is circled plus 25 is 5 and 5 multiplied and 5 is a prime number.

8 0
3 years ago
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