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IceJOKER [234]
3 years ago
15

Chang purchased n notebooks. They were 5 dollars each. Write an equation to represent the total cost c that Chang pald.

Mathematics
1 answer:
Len [333]3 years ago
4 0

Answer:

C=5n

Step-by-step explanation:

A linear function

Directly proportional

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Evaluate |-11| + |-7|.<br><br> -18<br> -4<br> 4<br> 18
Marta_Voda [28]

Answer:  D) 18

======================================================

Explanation:

|-11| simplifies to 11

|-7| simplifies to 7

Whatever is inside the absolute value, you just remove the negative and that's the result of that absolute value expression. It represents the distance on a number line. So for instance -11 is 11 units from 0, which is why |-11| = 11.

Overall,

|-11| + |-7| = 11 + 7 = 18

4 0
2 years ago
Find the sum 5/8 + 7/12<br> A) 1 5/24<br> B) 1/2<br> C) 12/20 <br> D) 5/24
Kay [80]
Are those your only choices?
3 0
2 years ago
Read 2 more answers
Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
Rzqust [24]

Answer:

a = 6 or 9

Step-by-step explanation:

The "a", "b", and "c" of the quadratic formula are the coefficients of a², a, and the constant term in the given equation:

... a = 2, b = -30, c = 108

Then the quadratic formula tells you the solutions are ...

... (-b ± √(b² -4ac))/(2a)

... = (-(-30) ± √((-30)² -4(2)(108)))/(2(2))

... = (30 ± √(900 -864))/4

... = (30 ± √36)/4

... = (30 ± 6)/4 = {24, 36}/4

... = {6, 9}

_____

The <em>a</em> variable should not be confused with the "a" that is used to name the coefficient of the square of the variable in the quadratic formula. If it is too confusing, rewrite one or the other. For example, you could write ...

... The solution to pa² +qa +r = 0 is ... a = (-q ± √(q²-4pr))/(2p)

where p=2, q=-30, r=108 in the given equation.

5 0
3 years ago
X÷3=3;x what does this mean in math terms
qaws [65]
In math terms this means x divided by 3=3 so x so x means 9 so the answer is nine
6 0
3 years ago
On the horizontal number line show how you will round 198.78 to the tens place &amp; write the rounded number. Given picture is
harkovskaia [24]
If the three slashes are 190, 195, and 200, we can see it as 
<span>-l----------l--------|--l- with the slightly longer line being around 198.78. Since it is clearly closer to the end of the line than the start of the line, we round it to 200</span>
7 0
3 years ago
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