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4 years ago

Anyone ?please help:') (middle school)

Mathematics

1 answer:

iren2701 [21]4 years ago

6 0

All you have to do is multiply the left column number by 8 for each one.

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I need help knowing how to show the work and how to get the answer and the answer it self

Morgarella [4.7K]

Find the separate areas.

We have a triangle with base 5 cm and height 5 cm, calculate the area:

$\sf A=\dfrac{1}{2}bh$

Plug in what we know:

$\sf A=\dfrac{1}{2}(5)(5)$

Multiply:

$\sf A=12.5~cm^2$

Now for the two quarter circles, we know that if we put these two together we will end up with a semi-circle with radius 5 cm. The formula for the area of a circle is:

$\sf A=\pi r^2$

A semi-circle is half of a whole circle, so the formula for the area of it must be:

$\sf A=\dfrac{1}{2}\pi r^2$

Now plug in what we know(use 3.14 to approximate for pi):

$\sf A\approx\dfrac{1}{2}(3.14)(5)^2$

Simplify the exponent:

$\sf A\approx\dfrac{1}{2}(3.14)(25)$

Multiply:

$\sf A\approx 39.25~cm^2$

Now add this to the area of the triangle to find the approximate area of the entire figure(round to the nearest tenth):

$\sf 39.25+12.5=\boxed{\sf 51.8~cm^2}$

4 0

3 years ago

Simplify<br> ( 3w + 7 ) + ( 2w + 5)

valentina_108 [34]

Answer:

The answer is 5w+12.

Step-by-step explanation:

Combine like terms:

(3w+7)+(2w+5)

5w+12

6 0

3 years ago

Find x. Write your answer in simplest radical form.

Leokris [45]

Answer:

x = $3\sqrt{11}$

Step-by-step explanation:

Using Pythagorean Theorem we can say;

15² + x² = 18²

225 + x² = 324

x² = 99

x = $\sqrt{99}$

To simplify this in the radical for we can say:

$\sqrt{9*11}$

$\sqrt{9}*\sqrt{11}$

$3\sqrt{11}$

So the answer = $3\sqrt{11}$

Hope this helps!

6 0

3 years ago

If a weight hanging on a string of length 5 feet swings through 6° on either side of the vertical, how long is the arc through w

garik1379 [7]

Answer:

1.047 ft

Step-by-step explanation:

The length of an arc is given by ...

s = rθ

where s is the arc length, r is the radius, and θ is the central angle in radians. Your arc subtends an angle of 12° = (12·π/180) = π/15 radians. The length of the arc is then ...

s = (5 ft)(π/15) = π/3 ft ≈ 1.047 ft

6 0

4 years ago

With

olasank [31]

Answer:

Each monthly payment is of £560.

Step-by-step explanation:

Sue buys a car costing £8000 plus 20% VAT?

She has to pay:

8000 plus 20% of tax. So

$T = 8000 + 0.2*8000 = 9600$

She pays £4000 deposit and then chooses to pay the balance in ten equal monthly payments.

4000 deposit, and then 9600 - 4000 = 5600 divided in ten equal monthly payments.

5600/10 = 560

Each monthly payment is of £560.

7 0

3 years ago