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3 years ago

What is the missing step of her solution?

Mathematics

1 answer:

Aneli [31]3 years ago

3 0

I’m not a 100 percent but the answer is a because you have to subtract 3/2 - -13/2 which equals -16/2 and divide and u get -8

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How many centimeters equal 39.4 meters?

earnstyle [38]

3940 centimeters
Each 100 centimeters is 1 meter

5 0

3 years ago

Read 2 more answers

Given: sin = 4/5 and cos x = -5/13 ; evaluate the following expression. Cos 2x

Nitella [24]

For every possible angle $x$ , the fundamental law of trigonometric states that

$\sin^2(x)+\cos^2(x) = 1$

In your case, the inputs you provided would lead to

$\dfrac{16}{25}+\dfrac{25}{169} = \dfrac{3329}{4225} \approx 0.8 \neq 1$

So, it is not possible that, for a certain angle x, we have

$\sin(x) = \dfrac{4}{5},\quad \cos(x) = -\dfrac{5}{13}$

5 0

3 years ago

Please help, giving Brainliest and 100 points!

Fudgin [204]

<u>percent of increase in students is 27.525</u>%

Answer:

Solution given:

first total no of students [FD]=396

next total no of students [ND]=505

increase %=?

we have

increase %= $\frac{ND-FD}{FD}×100=\frac{505-396}{396}×100=27.525%$ %

7 0

3 years ago

Read 2 more answers

Can you please show me how to do this problem. (I will mark Brainliest)

Kisachek [45]

Answer:

Sin A = 0.6896

Cos A = 0.7241

Tan A = 0.9524

Step-by-step explanation:

Using SOH-CAH-TOA

Sin A = Opposite / Hypotenous

= 20 / 29

= 0.6896

Cos A = Adjacent / Hypotenous

= 21 / 29

= 0.7241

Tan A = Opposite / Adjacent

= 20 / 21

= 0.9524

4 0

3 years ago

Solve each equation

aliya0001 [1]

Step-by-step explanation:

$0 = {x}^{2} - 7x - 18 \\ 0 = {x}^{2} + 2x - 9x - 18 \\ 0 = x(x + 2) - 9(x + 2) \\ 0 = (x + 2)(x - 9) \\ \\ \\ (x + 2) = 0 \: \: \: \: or \: \: \: \: (x - 9) = 0 \\ \\if \: \:x + 2 = 0 \\x = 0 - 2 \\ x = (- 2) \\ \\ if \: \:x - 9 = 0 \\ x = 0 + 9 \\ x = 9 \\$

5 0

3 years ago