A + c = 158......a = 158 - c
9.90a + 5.50c = 1265
9.90(158 - c) + 5.50c = 1265
1564.20 - 9.90c + 5.50c = 1265
- 4.40c = 1265 - 1564.20
-4.40c = - 299.20
c = -299.20/-4.40
c = 68 <=== 68 child tickets sold
3x + 4 - 5 (x + 2) is an equation ; -6 = 2x
Given,
3x + 4 - 5 (x + 2)
We have to find this is whether an expression, equation or inequality.
First we have to solve this:
3x + 4 - 5 (x + 2)
3x + 4 - 5x - 10
- 2x - 6
-6 = 2x
Here, we can identify this is an equation.
What is an equation?
The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.
Learn more about equation here;
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The answers are true true false
Answer:
(x - 10)(x + 8)
Step-by-step explanation:
x² - 2x - 80
Consider the factors of the constant term (- 80) which sum to give the coefficient of the x- term (- 2)
The factors are - 10 and + 8 , since
- 10 × 8 = - 80 and - 10 + 8 = - 2 , then
x² - 2x - 80 = (x - 10)(x + 8)
