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DedPeter [7]
3 years ago
13

Given f (x) = -3x - 1, solve for x when f (x) = -4

Mathematics
1 answer:
Aleks [24]3 years ago
8 0
Answer:
11
Explanation:
f(x) = -3x - 1 when f(x) = -4
f(x) = -4 * -3 -1 = 12 - 1 = 11
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Show work please. thank you
Eduardwww [97]
Problem 17, part A

i = simple interest = 900 dolars
p = principle = 1500 dollars
r = interest rate = 0.03 (decimal form of 3%)
t = time in years = unknown (leave it as t for now)

Plug in those values mentioned above and solve for t.

Simple interest formula
i = p*r*t
900 = 1500*0.03*t
900 = 45*t
900/45 = 45*t/45
20 = t
t = 20

Answer: 20 years

=============================================

Problem 17, part B

p = 1500
r = 0.03
t = 5 years

A = p+p*r*t
A = 1500+1500*0.03*5
A = 1500+225
A = 1725

Answer: 1725 dollars

=============================================

Problem 17, part C

Factor out the GCF p, then divide both sides by 1+rt

A = p+p*r*t
A = p*1+p*r*t
A = p*(1+rt)
A/(1+rt) = p*(1+rt)/(1+rt)
A/(1+rt) = p
p = A/(1+rt)

Answer: p = A/(1+rt)

The right side is the fraction of A all over the quantity (1+rt) which may be more readable if written like so 
p = \frac{A}{1+rt}
If you're going to write it in the way p = A/(1+rt) then don't forget to use parenthesis. 

4 0
3 years ago
A ball is thrown straight up from the top of a building 144 ft tall with an initial velocity of 48 ft per second. The height
fgiga [73]

Answer:

180feet

Step-by-step explanation:

Given the function that models the height of a ball

s(t) = 144 + 48t − 16t^2.

At maximum height, the velocity is zero ie. ds/dt  = 0

ds/dt = 48 - 32t

0 = 48 - 32t

48 = 32t

t = 48/32

t = 1.5secs

Get the maximum height

s(t) = 144 + 48t − 16t^2.

s(1.5) = 144 + 48(1.5)-16(1.5)^2

s()1.5) = 144 + 72 - 16(2.25)

s(1.5) = 144 + 72-36

s(1.5) = 180 feet

Hence the maximum height attained by the ball is 180feet

6 0
3 years ago
Really don't understand this :/ Please help.
andre [41]
I I think you have the correct answer!
5 0
3 years ago
How are these triangles congruent??????
Soloha48 [4]

Answer:

SAS Test

Step-by-step explanation:

6 0
3 years ago
Fractions : $1,000 <br><br> 1/4. <br><br> Someone plz help
olga2289 [7]

Not 100% sure exactly what you’re asking, but if you are asking what is 1/4 of $1,000, all we need to do to find the answer is <u>divide</u> $1,000 by the <u>denominator</u> of the fraction which is <u>4</u>

$1,000 ÷ 4 = $250

Therefore, 1/4 of $1,000 is $250


Hope this helps you

-AaronWiseIsBae

8 0
3 years ago
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