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4 years ago

9

I need help on these 3 questions. Please help. “Find the area of each figure. Round your answer to the nearest tenth, show your

work.

1 answer:

My name is Ann [436]4 years ago

6 0

The first one is 6x10+6x7/2=81

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If sin theta=-1/4 and theta terminates in the third quadrant, find the exact value of sin2 theta.

DIA [1.3K]

Answer:

$sin(2\theta)=\frac{\sqrt{15}}{8}$

Step-by-step explanation:

We are given

$sin(\theta)=-\frac{1}{4}$

Firstly, we can draw triangle

angle lies in third quadrant

so, we get

$cos(\theta)=-\frac{\sqrt{15} }{4}$

now, we can use formula

$sin(2\theta)=2sin(\theta)\times cos(\theta)$

now, we can plug values

$sin(2\theta)=2\times -\frac{1}{4}\times -\frac{\sqrt{15} }{4}$

now, we can simplify it

and we get

$sin(2\theta)=\frac{\sqrt{15}}{8}$

7 0

4 years ago

Read 2 more answers

Use the substitution method to solve the system of equations. Choose the correct ordered pair.

balandron [24]

Here you have 2 linear equations and are to solve this system. Both equations have already been solved for y, so you can set one of them = to the other one:

-2x+11 = -3x+21.

Then 3x-2x = 21 - 11, or x = 10 (answer)

Find y by subst. x = 10 into either of the given equations.

Solution is then (10, ? )

7 0

4 years ago

The following examples illustrate the inverse property of addition. Study the examples, then choose the statement that best desc

Ede4ka [16]

-a

That is the answer

8 0

4 years ago

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Anyone know how to solve this? I know the answers for j and g but I need help finding h, f and i!!!!!!! PLS HELP TY! (SEE ATTACH

Juliette [100K]

Step-by-step explanation:

RISE/RUN is an important rule...

f = $\frac{50}{3}$ = around 16.7 (3.s.f)

h = $\frac{(70-50)}{(6-4)}$ or $\frac{20}{2}$ = 10

i = $\frac{30}{1}$ = 30

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3 years ago

What is the value of the expression 2 + 4x (3 + 7) *

MAXImum [283]

Answer:

20=4x

Step-by-step explanation:

if finding x divide by 4 and x=5

8 0

3 years ago