2 years ago

Please help thankyou!

Mathematics

1 answer:

Dafna11 [192]2 years ago

6 0

I don't know what it's says

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What is the value of x? Please help. Will mark brainliest ASAP

Natasha_Volkova [10]

sin90°/47 = sin17°/x

xsin90° = 47sin17°

x = 47sin17°/sin90°

x = 13.741470121969

x ≈ 13.74

Hope this helps! ;)

6 0

3 years ago

Read 2 more answers

Simplify this expression: 13 + (–12) – (–5) = ? A. 6 B. –6 C. –30 D. 30

Anuta_ua [19.1K]

13 + (-12) - (-5)

13 - 12 + 5

1 + 5

= 6.

Answer is A)

3 0

3 years ago

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Find the area of a plane figure bounded by lines

natulia [17]

Answer: 4.5

Step-by-step explanation:

First, find the points of intersection by solving the system.

y = x² + 2x + 4

y = x + 6

Solve by substitution:

x² + 2x + 4 = x + 6 ⇒ x² + x - 2 = 0 ⇒ (x + 2)(x - 1) = 0 ⇒ x = -2, x = 1

Now, integrate from x = -2 to x = 1

$\int\limits^1_2 {(x+6)-(x^{2}+2x+4) } \,$ the bottom of the integral is -2

= $\int\limits^1_2 {x+6-x^{2}-2x-4 } \,$

= $\int\limits^1_2 {-x^{2}-x+2 } \,$

= $\frac{-x^{3}}{3} - \frac{x^{2}}{2}+2x\int\limits^1_2 {} \,$

= $(\frac{-1^{3}}{3} - \frac{1^{2}}{2}+2(1)) - (\frac{-(-2)^{3}}{3} - \frac{(-2)^{2}}{2}+2(-2))$

= $(\frac{-1}{3} - \frac{1}{2} +2) - (\frac{8}{3} -\frac{4}{2} -4)$

= $\frac{-9}{3} + \frac{3}{2} +6$

= -3 + 1.5 + 6

= 4.5

3 0

3 years ago

AlladinOne [14]

Answer:

A True

Step-by-step explanation:

tell me if I'm worng

4 0

2 years ago

Suppose the average math SAT score for students enrolled at local community college is 490.4 with a standard deviation of 63.7.

lakkis [162]

Answer:

Option B) 9.1

Step-by-step explanation:

We are given the following in the question:

Average score = 490.4

Standard deviation = 63.7

Sample size, n = 49

Formula:

$=\dfrac{\sigma}{\sqrt{n}}$

Putting values, we get,

Standard error =

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{63.7}{\sqrt{49}} = 9.1$

Thus, the correct answer is

Option B) 9.1

8 0

2 years ago