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Alborosie
3 years ago
10

Given right triangle abc and sin A= 1/2, cos A = √3/2

Mathematics
1 answer:
V125BC [204]3 years ago
7 0

Answer:

true

Step-by-step explanation:

sinA² + cosA²=1

⇔(1/2)² + cosA²=1

⇔cosA=±(√3/2)

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Tell whether the equation 5x + y = 0
Fofino [41]

Answer:

The equation 5x + y = 0  represents a direct variation

The  constant of variation is k=-5

Step-by-step explanation:

We need to tell if the equation 5x+y=0 represents a direction variation or not.

The equation for direct variation is: \mathbf{y=kx}

where k is constant of variation.

In the given equation:

5x+y=0\\y=-5x

Comparing it with general equation for direct variation \mathbf{y=kx} we get y=-5x so equation represents direct variation.

Value of k is -5

So, the  constant of variation is k=-5

5 0
3 years ago
There are x boys playing in the park. The number of girls playing in the park is equal to the square root of the number of boys.
konstantin123 [22]

Answer:

Option A. 36

Step-by-step explanation:

Let

x-------> the number of boys

y------> the number of girls

we know that

x+y=42 -----> equation A

y=\sqrt{x} -----> equation B

using a graphing tool to solve the system of equations

Remember that the solution is the intersection point both graphs

The solution is the point (36,6)

see the attached figure

therefore

The number of boys is 36

7 0
3 years ago
A bakery sells chocolate cupcakes and mocha cupcakes. One day it sold 138 chocolate and 162 mocha. What percent of the cupcakes
Ierofanga [76]

Answer:

88% of the cupcakes sold were chocolate :)

5 0
3 years ago
What two numbers multiply to get -420 and add to get -32
netineya [11]

I'm not at my desk and can't check it out right now.
But I think you should try  10  and  -42 .

7 0
4 years ago
A gold mine has two​ elevators, one for equipment and another for the miners. The equipment elevator descends 4 feet per second.
GrogVix [38]

Answer:

140 feet

Step-by-step explanation:

6 0
3 years ago
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