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3 years ago

C= 12r + 2 what is C? What is r?

Mathematics

1 answer:

postnew [5]3 years ago

8 0

Answer:

Unless there is some context behind it, with a picture or something here you are.

Step-by-step explanation:

C=12r+2

So, we have to find out what it could be.

You can plug in anything for r, so I'll make it easy.

r=1

C=12*(1)+2

12*1=12+2=14

C=14.

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How to answer this ?

inessss [21]

Answer:

Each term is separated by an addition or subtraction sign.

Coefficients are numbers in front of a variable (letter).

Constants are numbers with nothing else.

so you get

2 | 2 | 3 | 1

6 | 6 | 0.2, -1, 8 | 1/2

3 | -3 | - | -

Step-by-step explanation:

4 0

3 years ago

Write the equation for the parabola that has x− intercepts (1.2,0) and (4,0) and y− intercept (0,12).

zzz [600]

Equation of a parabola is written in the form of f(x)=ax²+bx+c.
The equation passes through points (4,0), (1.2,0) and (0,12), therefore;
replacing the points in the equation y = ax² +bx+c
we get 0 = a(4)²+b(4) +c for (4,0)
0 = a (1.2)²+ b(1.2) +c for (1.2,0)
12 = a(0)² +b(0) +c for (0,12)
simplifying the equations we get
16a + 4b + c = 0
1.44a +1.2b + c = 0
+c = 12
thus the first two equations will be
16a + 4b = -12
1.44 a + 1.2b = -12 solving simultaneously
the value of a = 5/2 and b =-13
Thus, the equation of the parabola will be given by;
y= 5/2x² - 13x + 12 or y = 2.5x² - 13x + 12

3 0

3 years ago

Read 2 more answers

Which formula can be used to find the math term of a geometric sequence where the first term is 8 and the common ratio is -3?

kipiarov [429]

$a_n = 8(-3)^{n-1}$

That would be the formula you would use.

6 0

3 years ago

The function y = 3.75 + 2.50(x - 3) can be used to determine the cost in dollars for a uber ride of x miles. What is the rate of

stepan [7]

The cost of each mile is $2.50.

If you simplify the expression given you will get the following.
y = 3.75 + 2.50(x - 3)
y = 3.75 + 2.50x - 7.50
y = 2.50x - 3.75.

Knowing that x is the number of miles and 2.50 is the number being multiplied by, we know that the cost per mile is 2.50.

4 0

3 years ago

Read 2 more answers

Diego's history teacher writes a test for the class with 26 questions. The test is worth 123 points and has two types of questio

maxonik [38]

Answer:

The number of essay questions on the test were 9

Step-by-step explanation:

Given as :

Total number of questions in a test = 26

Total points for the 26 questions = 123

The point for each multiple choice questions = 3

The point for each essay questions = 8

Let The number of multiple choice questions = m

Let The number of essay questions = e

Now, According to question

Total number of questions in a test = number of multiple choice questions + number of essay questions

Or, m + e = 26 .....A

Again

Total points for the 26 questions = point for each multiple choice questions × number of multiple choice questions + point for each essay questions × number of essay questions

i.e 3 × m + 8 × e = 123

Or, 3 m + 8 e = 123 .......B

Solving the equation we get

8 × ( m + e ) - (3 m + 8 e) = 8 × 26 - 123

Or, 8 m + 8 e - 3 m - 8 e = 208 - 123

Or,(8 m - 3m) + (8 e - 8 e) = 85

Or, 5 m + 0 = 85

∴ m = $\dfrac{85}{5}$

i.e m = 17

So,The number of multiple choice questions = m = 17

Put the value of m into eq A

∵ m + e = 26

Or, e = 26 - 17

i.e e = 9

So, The number of essay questions = e = 9

Hence, The number of essay questions on the test were 9 . Answer

7 0

3 years ago