3 years ago

Checking Your Understanding

Mathematics

1 answer:

madreJ [45]3 years ago

3 0

The ratio is - 6:12
(6 boys, 12 girls)

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2= n/3 what is n<br> pls helpp

Verdich [7]

Answer:

Step-by-step explanation:6/3= 2

3 0

2 years ago

Simplify the following expression by combining like terms.<br> 3x + 4x² - 7x+ 9x2

EleoNora [17]

Answer:

13x² - 4x

Step-by-step explanation:

3x + 4x² - 7x + 9x² ← collect like terms

= (4x² + 9x² ) + (3x - 7x)

= 13x² + (- 4x)

= 13x² - 4x

7 0

2 years ago

A sector with a radius of 8 cm has an area of 56pi cm2. What is the central angle measure of the sector in radians?

Maurinko [17]

Answer:

$\frac{7\pi}{4}$ .

Step-by-step explanation:

Given information:

Radius of circle = 8 cm

Area of sector = $56\pi\text{ cm}^2$

Formula for area of sector is

$A=\dfrac{1}{2}\theta r^2$

where, r is radius and $\theta$ is central angle in radian.

Substitute $A=56\pi$ and r=8 in the above formula.

$56\pi=\dfrac{1}{2}\theta (8)^2$

$56\pi=\dfrac{64}{2}\theta$

$56\pi=32\theta$

$\dfrac{56\pi}{32}=\theta$

$\dfrac{7\pi}{4}=\theta$

Therefore, the measure of the sector in radians is $\frac{7\pi}{4}$ .

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2 years ago

What is 40% of 39 ?

Zarrin [17]

Answer:

15.6

Step-by-step explanation:

40% × 39 = 15.6

Hope this helps

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2 years ago

Do all even numbers have 2 as their factor? Explain.

tresset_1 [31]

Answer:yes because if they are even two will be able to go into them not matter what

Step-by-step explanation:

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2 years ago