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3 years ago

Ill give brainly thing

Mathematics

2 answers:

Rainbow [258]3 years ago

6 0

Substitute 3 as x and the answer is 21

hoa [83]3 years ago

6 0

Answer:

Step-by-step explanation:

F(x)=3x12

Plug in F(3)=3x12

Simplyfi 3x . 12 = 39

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Evaluate log416 -2 1/2 2

krok68 [10]

16 = 4²

So, by the definition of logarithms

$\log_4{16}=2$

5 0

4 years ago

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

<u><em>The complete question is</em></u>

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

Help me with this math problem !!!

CaHeK987 [17]

Answer:

multiply the numerator together and denominator together

5 0

3 years ago

Can someone help me please these are my last 2 questions thank you so much if you answer

Slav-nsk [51]

Number 7 is a. 0.013
number 8 is c.3
_
5

6 0

4 years ago

Read 2 more answers

A person's heartbeat is 88 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does th

Anit [1.1K]

We can solve this problem by the rule of three.

88 beats-------------------1 minute
3.1*10⁹ beats------------ x

x=(3.1*10⁹ beats * 1 minute) / 88 beats=35227272.73 minutes.

Now, we express this amount of time in years.

1 year=365 days
365 days=365 day*(24 hour/1day)*(24 hour /1day)*(60 minutes /1hour)=
=525600 minutes.

525600 minutes----------------------1year
35227272.73 minutes----------------x

x=(35227272.73 minutes * 1year) / 525600 minutes=67.0229 years
≈ 67 years.

Answer:this person can live 67 years.

5 0

3 years ago