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3 years ago

H(x) = - 3x² + 2x, Find h(3).

Mathematics

1 answer:

spayn [35]3 years ago

5 0

Answer: h(3) = -21

Step-by-step explanation: If h(x) = -3x² + 2x, then h(3) = -3(3)² + 2(3)

which simplifies to -27 + 6 or -21.

Remember to always use parentheses

when substituting your given value in for x.

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How much work is done when a crane lifts a 100 N block from 2 m to 6 m above the ground?

Natali5045456 [20]

Im guessing it'll be C, but im not sure so im sorry if this didnt help

6 0

4 years ago

Inessa [10]

Answer:

*It will yield the same result.* tep-by-step explanation: who cares there's the answer kiddo ;)

6 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=9%20%5Cfrac%7B9%7D%7B10%7D%20%20%2B%202%20%5Cfrac%7B1%7D%7B4%7D%20%20%3D%20%20%5C%5C%20%206%20

frez [133]

Answer:

1. $445\frac{1}{2}$

2. $-1\frac{1}{12}$

3. $2\frac{11}{30}$

Step-by-step explanation:

1. $9\frac{9}{10} +2\frac{1}{4}$

I like to make it an improper fraction first.

$\frac{99}{10}+\frac{9}{4}$

Now take the LCM. The LCM is 20.

$\frac{198}{20} +\frac{45}{20}$

Now add them.

$\frac{8910}{20}$

Make this into a mixed number.

$445\frac{1}{2}$

That's your answer for number 1.

2. $6\frac{1}{4} -7\frac{1}{3}$

Do the same thing as the previous addition problem but subtract instead.

$\frac{25}{4} -\frac{22}{3}$

$\frac{75}{12} -\frac{88}{12}$

$-\frac{13}{12}=-1\frac{1}{12}$

$-1\frac{1}{12}$ is your answer for number 2.

3. $8\frac{2}{3}-6\frac{3}{10}$

$\frac{26}{3} -\frac{63}{10}$

$\frac{260}{30}-\frac{189}{30}$

$\frac{71}{30}=2\frac{11}{30}$

$2\frac{11}{30}$ is your answer for number 3.

I hope this helps! Let me know if you need help or if I got anything wrong :)

5 0

3 years ago

cain deposited $6033 into savings account 25 years ago the account has an interest rate of 4.2 and the balance is currently $720

Ksju [112]

Answer:

interest is compounded monthly

Step-by-step explanation:

there is a slight mistake in the question, the future value after 25 years is $17,208.63, not $7,208.63

the future value = present value x (1 + i/a)ⁿᵃ

future value = $17,208.63

present value = $6,033

i/a = 4.2%/a

n x a = 25a

(1 + 0.042/a)²⁵ᵃ = $17,208.63 / $6,033 = 2.852416708

²⁵√(1 + 0.042/a)²⁵ᵃ = ²⁵√2.852416708

(1 + 0.042/a)ᵃ = 1.042818

4.2818% would be the effective interest on the loan, so we can try different options for a. Since the effective interest is higher, I will try first with monthly compounding:

a = 12 (compounded monthly)

(1 + 0.042/12)¹² = (1 + 0.0035)¹² = 1.042818 ✓

7 0

3 years ago

Simplify each expression [18-(-1-7)^2]+16÷2^4

vivado [14]

Answer: -15/8

Step-by-step explanation:

Using PEMDAS:

[18-(-8)^2] + 16 / 2^4

(18-64)+16 / 16

-46+16 / 16

-30/16

(Simplified) -15/8

3 0

3 years ago