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3 years ago

Simplify the expression to a polynomial in standard form: (3x+1)(2x^2-5x+7)

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

5 0

Answer:

6x^3-13x^2+16x+7

Step-by-step explanation:

(3x+1)(2x^2-5x+7)

6x^3-15x^2+21x+2x^2-5x+7

6x^3-15x^2+2x^2+21x-5x+7

6x^3-13x^2+16x+7

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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

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3 years ago

Find a bank account balance if the account starts with $100, has an annual rate of 4%, and the money is left in the account for

Mamont248 [21]

100 x .4 = 40

40 x 12 = 480

The bank account would have $480 over 12 years. Hope this helps and please mark brainliest

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2 years ago

Fernanda and Jose were working on an assignment in their geometry class in which they were to write the equation of the graph be

Alborosie

Answer:

yes they both are wrong

Step-by-step explanation:

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so h= 4 and k = -3

radius is 4 units (3+1)

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2 years ago

Convert 570 cm to hm

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0.057 is the correct answer! Have a great week!

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