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2 years ago

10

Which of the following can be calculated using formula C= 2πr

2 answers:

LenaWriter [7]2 years ago

8 0

Answer:

The circumference of circle.

Step-by-step explanation:

We have been given a formula $C=2\pi r$ . We are asked to find the formula is used to calculate which value.

We know that our given formula is used to calculate circumference of circle as C stands for circumference of circle and r represents radius of circle.

Therefore, the given formula is used to calculate the circumference of circle.

Semenov [28]2 years ago

5 0

Hello!

In this formula, C represents the circumference, as pi and r, the radius are in the equation. 2r is also equal to the diameter.

The answer is the circumference.

Hope this helps!

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If it starts out at -10 degrees, what will the temperature be if it rises 30 degrees?

Bond [772]

add 30 to -10:

-10 + 30 = 20

Answer is B.

4 0

3 years ago

I need help with this problem

guapka [62]

Answer:

C

Step-by-step explanation:

in trangle NET the angles are 81 and 34 so the other angle must be 180-81-34=65, the other triangle has the same measurments for angles 81-34-65 so the triangles are similar because of AA similarity theorem

ΔHMJ~ΔNET by AA similarity

6 0

2 years ago

IS THIS CORRECT?! I HAVE A BACK SIDE TOO, IF ANYTHING IS WRONG PLS PLS LMK!!

Fudgin [204]

The only error you made is on problem 3. Everything else is correct. Nice work.

-------------------------------------------------------

Here is how to solve problem 3

Plug x = 1 into the equation and solve for y

-3x + y = 1

-3*1 + y = 1 ... replace x with 1

-3 + y = 1

y - 3 = 1

y - 3 + 3 = 1 + 3 .... add 3 to both sides

y = 4

<h3>The answer is 4</h3>

-------------------------------------------------------

Verifying the answer:

Plug (x,y) = (1,4) into the equation. Both sides should be the same number after simplifying both sides.

-3x + y = 1

-3*1 + 4 = 1 ..... replace x with 1; replace y with 4

-3 + 4 = 1

1 = 1

The answer is confirmed.

If you were to graph -3x + y = 1, which is equivalent to y = 3x+1, you'll find that the point (1,4) is on this line.

4 0

2 years ago

snow_lady [41]

Answer:

$2000 was invested at 5% and $5000 was invested at 8%.

Step-by-step explanation:

Assuming the interest is simple interest.

<u>Simple Interest Formula</u>

I = Prt

where:

I = interest earned.
P = principal invested.
r = interest rate (in decimal form).
t = time (in years).

Given:

Total P = $7000
P₁ = principal invested at 5%
P₂ = principal invested at 8%
Total interest = $500
r₁ = 5% = 0.05
r₂ = 8% = 0.08
t = 1 year

Create two equations from the given information:

$\textsf{Equation 1}: \quad \sf P_1+P_2=7000$

$\textsf{Equation 2}: \quad \sf P_1r_1t+P_2r_2t=I\implies 0.05P_1+0.08P_2=500$

Rewrite Equation 1 to make P₁ the subject:

$\implies \sf P_1=7000-P_2$

Substitute this into Equation 2 and solve for P₂:

$\implies \sf 0.05(7000-P_2)+0.08P_2=500$

$\implies \sf 350-0.05P_2+0.08P_2=500$

$\implies \sf 0.03P_2=150$

$\implies \sf P_2=\dfrac{150}{0.03}$

$\implies \sf P_2=5000$

Substitute the found value of P₂ into Equation 1 and solve for P₁:

$\implies \sf P_1+5000=7000$

$\implies \sf P_1=7000-5000$

$\implies \sf P_1 = 2000$

$2000 was invested at 5% and $5000 was invested at 8%.

Learn more about simple interest here:

brainly.com/question/27743947

brainly.com/question/28350785

5 0

1 year ago

The test scores for the exam in statistics class have a mean of 78 points and standard deviation of 9 points. A student is rando

frutty [35]

Answer: the answer is 809

Step-by-step explanation:

3 0

1 year ago