Need help will give brainlist

Mathematics

1 answer:

AnnZ [28]2 years ago

4 0

Answer:

It's the 2nd one 3y2-43y over 12y2

Step-by-step explanation:

First u do a common denominator u multiply on the first side by 6y on the second side by 4 then u solve it till u get 6y2-86y over 24y2 then simplify by dividing by 2

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Find the area of each figure. round to the nearest tenth if necessary .

Alex787 [66]

We first would divide the Pentagon into two shapes, one a square and the other a triangle. To find the height of the triangle we must minus the 15cm to the 10cm, which gives us 5cm.

5cm= height of triangle

7cm= base of triangle

Then, apply the area of triangle formula

which is: A=(b×h)÷2

so the area would be 17.5cm squared.

For the square, 10= height and the 7=base

The formula for rectangles is:

A=b×h

so, the area is 70cm squared.

if you want the total area add the two area together, which equals 87.5cm squared.

I hope this helps.

7 0

3 years ago

If sin θ = 1 over 4 and tan θ > 0, what is the value of cos θ? (1 point)

Dima020 [189]

Answer:

There are two options: b) $\frac{\sqrt{15}}{4}$ , c) $\sqrt{15}$ .

Step-by-step explanation:

By Trigonometry, we know that function tangent is equal to the following identity in terms of functions sine and cosine:

$\tan \theta = \frac{\sin \theta}{\cos \theta}$ (1)

If we know that $\tan \theta > 0$ and $\sin \theta = \frac{1}{4}$ , then $\cos \theta > 0$ . Hence, we have two possibilities: b) $\frac{\sqrt{15}}{4}$ , c) $\sqrt{15}$ .