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mars1129 [50]
3 years ago
11

Hepppp on 11 12 13 please

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0
Hope this helps you!

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Prove sin^2 theta-sin^2 theta is sin tetha sin 3 theta<br><br>how to prove..pls help!! thanksss
Artemon [7]
Simply you can substitute theta=45 degrees (or any angle,not zero) in left hand side and right hand side.

or 

using a^2 - b^2 =(a+b)(a-b)

= sin(2x+x)sin(2x-x)
= sin 3x sin x
3 0
3 years ago
which shape has no lines of symmetry, four unequal sides, two right angles and one pair of parallel lines?
Lina20 [59]

Answer:

circle and two lines that don't touch and are the same length are parrarell

6 0
3 years ago
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Allen traveled for 7 hours at a constant rate of 40 miles per hour. Anna traveled the same distance at a constant rate of 50 mil
Tamiku [17]

Answer:

Time taken by Anna = x = 5.6 hours

Explanation:

Strategize. Let x = Anna's time.

We know that, d = s*t

Where,

d is distance

s is speed

t is time

Distance covered by Allen = 7 times 40 = 7*40 = 280

Distance travelled by Anna = x times 50 = 50x

Set up. 7(40)=x(50)

280 = 50x

Solve for x

x = \frac{280}{5}

x = 5.6 hours

Identify.  Anna's time is the unknown.

Solve. x = 5.6

Check. 7(40)=5.6(50)

280 = 280

You're right!

That's the final answer.

I hope it will help you.

7 0
3 years ago
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what is an equation of the line that passes through (3-1) and is parallel to y = -4x + 1 in slope intercept form?
Agata [3.3K]
So we are given that the line passes through (3,-1)
also been given the parallel line, we can tell that the slope is -4
to make a slope intercept form equation...
y = -4x +11

Hope this helps :)
4 0
4 years ago
How many solutions does the equation have 5(n-2)=5n-10
otez555 [7]
5(n-2) = 5n -10

5n - 10 = 5n-10

ALL REAL NUMBERS
8 0
4 years ago
Read 2 more answers
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