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Semenov [28]
3 years ago
9

The area of a circle is 78.5 cm2. What is the diameter of the circle?

Mathematics
2 answers:
Svetllana [295]3 years ago
6 0
Your answer is 157, i'm pretty sure


kirill115 [55]3 years ago
5 0
Hello : 
The area of a circle is : A = <span>π × r² 
r² = A/</span><span>π 
r² = 78.5/3.14
r² = 25
r = 5
but : d = 2r    ... r : ridus and  d : </span><span>the diameter
so : d= 10</span>
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(9.5) - (-4.36) (1.094)
Nadya [2.5K]
What are you supposed to do?
5 0
3 years ago
Jim needs to rent a car. A rental company charges $21.00 per day to rent a car and $0.10 for every mile driven.
Ulleksa [173]

Answer:

21d+25\leq 115

Max is 4 days.

Step-by-step explanation:

An inequality is a math statement with more the one solution. The solution has a range of values for which the inequality can be satisfied. It has the same following components as an equation: variables and operations. However, the equal sign is replaced by an inequality sign: ,\leq,\geq.

We start by choosing a variable for an unknown value. Here is it the number of days he rents the car. We choose d.

We know he rents it for $21 pr day or 21d for any number of days. We also know her will drive 250 miles at $0.10 per mile or 0.10(250). We will combine the two into an expression.

21d + 0.10(250)

We know his limit is $115. This means he can rent the car for any number of days until he reaches $115. The charge must be less than or equal to 115.

So we write 21d+0.10(250)\leq 115.

To find the number of days he can rent the car, we solve for d using inverse operations.

21d+0.10(250)\leq 115\\21d+25\leq 115\\21d+25-25\leq 115-25\\21d\leq 90\\\frac{21d}{21} \leq \frac{90}{21}\\d\leq 4.3

This means Jim can rent the car up to 4 days. The 5th day will put the cost over $115.

3 0
3 years ago
Find three consecutive odd numbers whose sum is 1875.
masya89 [10]

Answer:

smaller number = 623

middle number = 625

larger number = 627

Step-by-step explanation:

Variable: X = smallest number

If these numbers are consecutive and odd, then the numbers would be:

x, x+2, x+4

x + (x + 2) + (x + 4)= 1875

3x + 6 = 1875

3x = 1869

x = 623

x + 2 = 625

x + 4 = 627

Check:

623 + 625 + 627 = 1875

4 0
3 years ago
Some please help with this problem, I have tried multiple time but still couldn't get the right answer. :(
Tanzania [10]

Given data:

Total number of songs = 8

Rock songs = 3

Reggae songs = 2

Country songs = 3

Probability = Number of favorable outcomes / Total number of outcomes

To find:

When song is selected randomly to play first song and then second song from remaining ones ,

Probability when both the songs are from Reggae songs,

\begin{gathered} P\text{ =}\frac{2}{8}\times\frac{1}{7} \\ \text{   = }\frac{2}{56} \end{gathered}P=\frac{1}{28}

Thus , the probability is 1/28.

4 0
11 months ago
Help please, you smart peoples ;-; Will give brainliest!
Norma-Jean [14]

Answer:

0.25

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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