1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tia_tia [17]
3 years ago
10

Given ƒ(x) = 3x + 9, find x when ƒ(x) = 21.

Mathematics
2 answers:
Dima020 [189]3 years ago
7 0
3x + 9 = 21
3x = 12
x = 4
maksim [4K]3 years ago
6 0

Answer:

4

Step-by-step explanation:

ƒ(x) = 3x + 9; Substitute 21 for ƒ(x).

21 = 3x + 9

21 − 9 = 3x

12 = 3x → x = 4

You might be interested in
A jar of natural peanut butter normally cost $4.00. Today its on sale for $3.60. What is the percentage of the discount
mafiozo [28]

Answer:

Ambitious

Answer

Find out the what is the percentage of this discount .

To prove

Formula

Discount = Marked price - selling price

As given

a jar of natural peanut butter normally costs $4.00 .

it's on sale for $3.60 .

thus

Marked price = $4.00

selling price = $3.60

put in the above formula

Discount = 4.00 - 3.60

              = 0.4

Formula

put the value

Discount percentage = 10%

Option (a) is correct .

Hence proved

8 0
3 years ago
Two small fires are spotted by a ranger from a fire tower 60 feet above ground. The angles of depressions re 11.6° and 9.4°. How
Hitman42 [59]
<span>The two fires are about 70 feet from each other. The assumption is that the ground is relatively level and that a right triangle will be made with the three points of the triangle being the ranger, the spot on the ground directly beneath the ranger, and the fire itself. So the distance to the first fire will be: Calculate the angle. That will be 90° - 11.6° = 78.4° The distance will be tan(78.4) = X/60 60 tan(78.4) = X 60 * 4.871620136 = X 292.2972082 = X And that's how far the 1st fire is from the ranger's station. Now for the 2nd angle = 90° - 9.4° = 80.6° 60 tan(80.6) = X 60 * 6.040510327 = X 362.4306196 = X And the distance between the two fires will be the difference in distance from the tower, so 362.4306196 - 292.2972082 = 70.13341146 Rounding to 2 significant figures gives 70 feet.</span>
4 0
3 years ago
Which is NOT a property of a parallelogram?
Elena L [17]

diagonals are congruent

3 0
3 years ago
True or False: The difference of two consecutive square numbers is an odd number.
KATRIN_1 [288]
The answer for this question would be true
4 0
3 years ago
Read 2 more answers
$27 for four large pizzas or $32 for five large pizzas?
diamong [38]

Answer:

$32 for five large pizzas.

Step-by-step explanation

Well, 27 ÷ 4 = 6.75 per pizzas. 32 ÷ 5 = $6.4 per pizza. For five, you pay less.

Your welcome °ω°

4 0
2 years ago
Other questions:
  • The area of a square carpet tile is 900 square centimeters. What is the length of one edge of the tile in centimeters
    8·1 answer
  • Which division fact corresponds to the problem of 8×9 equals 72
    11·1 answer
  • Describe each Locus
    6·1 answer
  • −3 3/4×5/6−2 1/3<br> I need help
    8·2 answers
  • The graph of the function C(x) = −0.52x2 + 23x + 92 is shown. The function models the production cost, C, in thousands of dollar
    12·2 answers
  • A rope is tied to the bottom of a hot air balloon ad shown below The rope makes an angle of 35 with the ground and is 75 ft long
    10·1 answer
  • Hiw do u get the third angle of a triangle? I was given 65 and 65?
    15·2 answers
  • In a group of twelve people, four had been selected for a transfer. If two of the twelve are selected, what is the probability t
    10·1 answer
  • Explain how the ratios 5 tacos for every 2 guest and 2 tacos for every 5 guests are different. Include a model in your explanati
    7·1 answer
  • The mean radius of Main Street Park is 15 km and the mean radius of Uptown Park is 8 km. What is the approximate difference in t
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!