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irinina [24]
3 years ago
7

A traintravels 200 kilometers in 2.5 hours. whatis the trains average speed per hour

Mathematics
1 answer:
marusya05 [52]3 years ago
5 0
I think it may be 80 km/h?
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Sam's mother is twice as old as sam, In 12 years, Sam will be as old as his mother was 12 years ago. How old are is sam and his
irinina [24]

Answer:

12 and 24

Step-by-step explanation:

cuz if he's 12 and she's 24 in 12 years he'll be 24

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Factor completely: 10ax + 5bx - 8ay - 4by
kiruha [24]
The answer is (5x - 4y)(2a + b)

10ax + 5bx - 8ay - 4by = 10ax + 5bx - (8ay + 4by) =<span>
                                      = 5x * 2a + 5x * b - (2a * 4y + b * 4y) =
                                      = 5x(2a + b) - 4y(2a + b) = 
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3 years ago
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8 0
3 years ago
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Multiply or divide the following expression: Reduce all answers to lowest terms. Factor the following completely.
Semmy [17]

A function assigns the values. The value of f(-3) and f(3) + f(-3) is 8 and -8, respectively.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given the function f(x)=-x²-4x+5, therefore, the value of f(x) when the value of x is -3 is,

f(-3) = -(-3)² - 4(-3) + 5

f(-3) = -9 + 12 + 5

f(-3) = 8

Now, the value of f(x) when the value of x is 3 is,

f(3) = -(3)²-4(3)+5

f(3) = - 9 - 12 + 5

f(3) = -16

further, the value of f(3) + f(-3) is,

f(3) + f(-3) = -16 + 8

f(3) + f(-3) = -8

Hence, the value of f(-3) and f(3) + f(-3) is 8 and -8, respectively.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

7 0
2 years ago
What is the slope of the line x=3? <br><br>plz hurry​
zalisa [80]
1 over 3 since its rise over run and the x would be on the bottom and since you dont have a y it would be 1
6 0
3 years ago
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