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2 years ago

Helen draws a random circle She then measures the diameter and circumference

Mathematics

1 answer:

miv72 [106K]2 years ago

6 0

Answer:

do pi witch is 2 times pi times r for the diameter

Step-by-step explanation:

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Horatio is solving the equation Negative three-fourths + two-fifths x = StartFraction 7 Over 20 EndFraction x minus one-half. Wh

nata0808 [166]

Answer:

x = 5

Step-by-step explanation:

Step 1: Write equation

-3/4 + 2/5x = 7/20x - 1/2

Step 2: Subtract 7/20x on both sides

-3/4 + 1/20x = -1/2

Step 3: Add 3/4 to both sides

1/20x = 1/4

Step 4: Divide 1/20 on both sides

x = 5

6 0

2 years ago

Maria will spin the arrow on the spinner 2 times. What is the probability that the arrow will stop on the same letter twice? 19

gavmur [86]

Suppose the spinner lands on a. There's a 1/3 chance that it'll land on a the second time.
Suppose the spinner lands on b. There's a 1/3 chance that it'll land on b the second time.
Suppose the spinner lands on c. There's a 1/3 chance that it'll land on c the second time.

We've covered all possibilities for the first spin, and they're all equal, so their average is 1/3.

The probability that it'll land on the same letter twice is 33.3%.

5 0

2 years ago

How can patterns be used to determine products of a number and a power of 10?

Sveta_85 [38]

Patterns can be used to determine products of a number of a power of 10 by following it to obtain easily the answer. When you multiply a number by the power of 10 you just have to write the number then add the number of corresponding number of 0s to the end which will be the same number as the power used.

Hope this helped : )

8 0

2 years ago

Read 2 more answers

Heidi solved the equation 3(x + 4) + 2 = 2 + 5(x – 4). Her steps are below: 3x + 12 + 2 = 2 + 5x – 20 3x + 14 = 5x – 18 14 = 2x

konstantin123 [22]

First, she distributed $3*x=3x , 3*4=12, 5*x= 5x, 5* -4= -20$
Which gave her $3x+12+2=2+5x-20$
Then, she combined like terms $12+2=14 and 2+ -20 = -18$
Which gave her $3x+14=5x-18$
Then, she subtracted $3x$ from both sided
Which gave her $14=2x-18$
Then, she added $18$ to both sides
Which gave her $32=2x$
And finally sh edivided 32 by 2 and got $16=x$
hope this helps if you have any questions please pm me :)

5 0

2 years ago

Read 2 more answers

The chicken coup at the petting farm is 10 by 14 feet. The farm would like to double the current area

weeeeeb [17]

Answer:

14.85 feet & 18.85 feet

Step-by-step explanation:

This is a rectangle with area 10 * 14 = 140 sq. ft.

We want new rectangle to be DOUBLE this area, so that area would be:

140 * 2 = 280 sq. ft.

We will add same amount, x, to both length and width, to get 280. Lets do this and find x. [note: length * width = area]

Area = length * width

280 = (10+x)*(14+x)

280 = 140 + 10x + 14x + x^2

0 = -140 + 24x + x^2

We can solve this by using middle term factorization:

$x^2+24x-140=0\\x=4.85$

So, we need to add around 4.85 feet to both length and width

New dimensions are 14.85 feet & 18.85 feet

3 0

2 years ago