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3 years ago

Does anybody know this????

Mathematics

1 answer:

jekas [21]3 years ago

3 0

F(x) = 2 * 2 ^x

f(-2) = 2 * 2^-2

f = 0.5

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confirm or disprove ernest's work by selecting two different points and applying the slope formula. be sure to identify the poin

yan [13]

Answer:

Part a) Ernest's calculation was correct

Part b) Ernest's calculation was correct

Step-by-step explanation:

The picture of the question in the attached figure

The complete question is

Ernest calculated the slope of the graph during the uphill climb to be 10. His work is shown below.

Points: (60.900). (15, 450)

Slope : 900-450/60-15=450/45=10

Part a) Determine whether his calculation was correct or incorrect, and then explain why.

Part b) Confirm or disprove Ernest's work by selecting two different points and applying the slope formula. be sure to identify the points you chose

Part a)

we know that

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have the points

A(60,900),B(15,450)

Remember that

$m_A_B=m_B_A$

step 1

Find $m_A_B$

substitute in the formula

$m_A_B=\frac{450-900}{15-60}\\\\m_A_B=\frac{-450}{-45}=10$

step 2

Find $m_B_A$

substitute in the formula

$m_B_A=\frac{900-450}{60-15}\\\\m_B_A=\frac{450}{45}=10$

therefore

Ernest's calculation was correct, because $m_A_B=m_B_A$

Part b) selecting two different points

we take the points

(0,300) and (50,800) -----> see the attached figure

substitute in the formula of slope

$m=\frac{800-300}{50-0}$

$m=\frac{500}{50}$

$m=10$

therefore

Ernest's calculation was correct

8 0

3 years ago

I NEED HELP PLZZ ASAP!!!

Crazy boy [7]

Answer:

612 I'm pretty sure.

Hope this helps!

Narancia out~!

3 0

3 years ago

What is the solution to the inequality? −4x−8>−20

Sliva [168]

−4x−8>−20
Add 8 to both sides
-4x>-12
Divide both sides by -4
Final Answer: x<3

4 0

3 years ago

There are 480 sophomores and 520 juniors in a high school. Find the ratio of juniors to sophomores

kow [346]

Answer:

13:12, 13 to 12, or 13/12

Step-by-step explanation:

520:480

Divide both numbers by GCF (40)

13:12

4 0

3 years ago

The Balance of your checking account is $751.You write checks for $49,$36,and $125.You then Deposit $148 from your paycheck.What

olganol [36]

Answer:

your new balance is $689.

Step-by-step explanation:

1.) subtract 49 from 751, then subtract 36 from that amount then 125 from that amount.(your balance at this point should be 541.)

2.) add 148 to 541 which should make you nee balance be 689

8 0

4 years ago