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4 years ago

14

The big wheel could have a 52 inch diameter and the small wheel could have an 18 inch diameter, what is the circumference of the

big wheel?

1 answer:

kati45 [8]4 years ago

6 0

26 inch diameter because 52 divided by 2 is 26.

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9. Bella hiked a 13-kilometer trail at Great Peak. How many meters did Belle

wariber [46]

Answer:

D. 13,000

Step-by-step explanation:

If there are 1,000 m in 1 km, we can find the number of meters she hiked by multiplying 13 by 1,000:

13(1000)

= 13,000

So, Belle hiked 13,000 meters.

The correct answer is D. 13,000

8 0

3 years ago

A circle has a radius of 5 in. A central angle that measures 150° cuts off an arc.

Slav-nsk [51]

Answer:

Part 1) The exact value of the arc length is $\frac{25}{6}\pi \ in$

Part 2) The approximate value of the arc length is $13.1\ in$

Step-by-step explanation:

step 1

Find the circumference of the circle

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=5\ in$

substitute

$C=2\pi (5)$

$C=10\pi\ in$

step 2

Find the exact value of the arc length by a central angle of 150 degrees

Remember that the circumference of a circle subtends a central angle of 360 degrees

by proportion

$\frac{10\pi}{360} =\frac{x}{150}\\ \\x=10\pi *150/360\\ \\x=\frac{25}{6}\pi \ in$

step 3

Find the approximate value of the arc length

To find the approximate value, assume

$\pi =3.14$

substitute

$\frac{25}{6}(3.14)=13.1\ in$

7 0

3 years ago

If a teacher had 10 percent of her students fail, how many would that be if she had 130 students

Nimfa-mama [501]

Answer:

13

Step-by-step explanation:

Multiply 130 by .10, To Multiply a number by a percent you have to move the decimal two places to the left.

6 0

3 years ago

Read 2 more answers

Simplify the expression. State any excluded values.<br><br> x^ 2 - 36/42x - 7x^ 2

REY [17]

Consider the expression $x^2-\dfrac{36}{42}x-7x^2.$

This expression contains two terms with $x^2,$ group them:

$x^2-7x^2=x^2(1-7)=-6x^2.$

Now simplify term $\dfrac{36}{42}x=\dfrac{6}{7}x.$

Now $x^2-\dfrac{36}{42}x-7x^2=-6x^2-\dfrac{6}{7}x=6\left(-x^2-\dfrac{1}{7}x\right)=-6x\left(x-\dfrac{1}{7}\right).$

This expression is defined for all x.

3 0

4 years ago

If x + 4y = 18 and x - 4y = 2, then x = ?<br><br> My Answer:____

kupik [55]

Answer:

Therefore x =5

Step-by-step explanation:

marke me as branalist answer

7 0

3 years ago