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3 years ago

Find the value of the expression. 3x3 +(4x)? when x = -2

Mathematics

2 answers:

valentina_108 [34]3 years ago

5 0

Answer:

3×3+(4x)

3×3+(-8)

9+(-8)

alina1380 [7]3 years ago

5 0

Answer:

-32

Step-by-step explanation:

3x³ +(4x)

3(-2)³ + [4(-2)]

3(-8) - 8

-24 - 8

-32

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If joe runs 1,600 meters in 5 minutes, what is joes speed?

ruslelena [56]

Answer:

320 meters per minute, or 19,200 meters per hour

Step-by-step explanation:

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4 years ago

The 7th grade has 195 students. There are 25 more girls than boys in the grade. How many boys are there in 7th grade

Anon25 [30]

110 girls and 85 boys.

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3 years ago

Which is the inverse of the function a(d)=5d-3? And use the definition of inverse functions to prove a(d) and a-1(d) are inverse

Drupady [299]

Answer:

$a'(d) = \frac{d}{5} + \frac{3}{5}$

$a(a'(d)) = a'(a(d)) = d$

Step-by-step explanation:

Given

$a(d) = 5d - 3$

Solving (a): Write as inverse function

$a(d) = 5d - 3$

Represent a(d) as y

$y = 5d - 3$

Swap positions of d and y

$d = 5y - 3$

Make y the subject

$5y = d + 3$

$y = \frac{d}{5} + \frac{3}{5}$

Replace y with a'(d)

$a'(d) = \frac{d}{5} + \frac{3}{5}$

Prove that a(d) and a'(d) are inverse functions

$a'(d) = \frac{d}{5} + \frac{3}{5}$ and $a(d) = 5d - 3$

To do this, we prove that:

$a(a'(d)) = a'(a(d)) = d$

Solving for $a(a'(d))$

$a(a'(d)) = a(\frac{d}{5} + \frac{3}{5})$

Substitute $\frac{d}{5} + \frac{3}{5}$ for d in $a(d) = 5d - 3$

$a(a'(d)) = 5(\frac{d}{5} + \frac{3}{5}) - 3$

$a(a'(d)) = \frac{5d}{5} + \frac{15}{5} - 3$

$a(a'(d)) = d + 3 - 3$

$a(a'(d)) = d$

Solving for: $a'(a(d))$

$a'(a(d)) = a'(5d - 3)$

Substitute 5d - 3 for d in $a'(d) = \frac{d}{5} + \frac{3}{5}$

$a'(a(d)) = \frac{5d - 3}{5} + \frac{3}{5}$

Add fractions

$a'(a(d)) = \frac{5d - 3+3}{5}$

$a'(a(d)) = \frac{5d}{5}$

$a'(a(d)) = d$

Hence:

$a(a'(d)) = a'(a(d)) = d$

7 0

3 years ago

Please help!!!!!I’ll mark you as brainliest!!!!!!

statuscvo [17]

Answer: B $50,700

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65,000-4,900-7,400-2,000=50,700

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3 years ago

Read 2 more answers

I need help really bad

sdas [7]

Answer:

the x intercept=(-6,0) and y intercept=(0,14)

Step-by-step explanation:

i used math may but put the m as w, it works

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3 years ago

Find the value of the expression. 3x3 +(4x)? when x = -2 ￼

Find the value of the expression. 3x3 +(4x)? when x = -2