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VLD [36.1K]
3 years ago
6

What is the average rate of change of the function f(x) = x2 + 4 for 1 Sx <5?

Mathematics
1 answer:
maxonik [38]3 years ago
3 0

Solve the equation for 1 and 5:

1^2 +4 = 1+4 = 5

5^2 + 4 = 25 +4 = 29

Find the difference:

29 -5 = 24

Find the difference of the X values: 5-1 = 4

Rate of change is the change in Y over the change in X:

The rate of change would be: 24/4 = 6

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7.Kristy baked 18 cookies. She took 2/3 of the cookies to work. How many cookies did she NOT take to work? 4 6 8 12
Anit [1.1K]
Here's the equation:
18 - 18 * 2/3
18 - 36/3
18 - 12
6
She didn't take 6 cookies to work.
3 0
3 years ago
Read 2 more answers
A metalworker has a metal alloy that is 30% copper and another alloy that is 65% copper. How many kilograms of each alloy should
LenKa [72]

Step-by-step explanation:

If x is the mass of 30% copper alloy, and y is the mass of 65% copper alloy, then:

x + y = 80

0.30x + 0.65y = 0.51(80)

Solving the system of equations using substitution:

0.30x + 0.65(80 − x) = 0.51(80)

0.30x + 52 − 0.65x = 40.8

11.2 = 0.35x

x = 32

y = 80 − x

y = 48

The metalworker needs 32 kg of 30% copper alloy and 48 kg of 65% copper alloy.

7 0
3 years ago
Ellie practices piano 2/3 h per day, several days each week. She practiced piano 32 2/3 hours during the summer. What equation c
natima [27]

The answer should be 32 2/3. Sorry I'm late, but hope this helps.

5 0
3 years ago
Hey !! Can someone please help me with this??
Katyanochek1 [597]

Answer:

8^2 and 4 x 4 x 4

Step-by-step explanation:

4 to the third power, is the same as 4 x 4 x 4.

This is then equal to 64.

8 squared is also equal to 64, making it also an answer.

None of the other ones work.

<em>Hope this helps and have a nice day!! :) :] :D</em>

7 0
3 years ago
Select all of the choices that are equal to (-5) – (-12).
krek1111 [17]
The answer is 7 i’m pretty sure
4 0
3 years ago
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