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Scrat [10]
3 years ago
13

Find f(-3) if f(x) = x 2. A) 6 B-9 C)9 D-6

Mathematics
1 answer:
Firlakuza [10]3 years ago
8 0

Answer: f(-3)=(-3)^2

f(-3)=9

the answer is C

Step-by-step explanation:

You might be interested in
Solve the equation, and check the solutions √(x+9)/4=3.
nadya68 [22]

Answer:

Solution: x = 135

Step-by-step explanation:

Hi there!

First, let´s write the equation:

√(x + 9) /4 = 3

Multiply by 4 both sides of the equation

√(x + 9) = 12

square both sides of the equation

x + 9 = 144

subtract 9 to both sides of the equation

x = 135  

Let´s check the solution:

√(x + 9) /4 = 3

x = 135

√(135 + 9) /4 = 3

√(144) /4 = 3

12/4 = 3

3 = 3

Then, x = 135 is the solution to the equation.

Have a nice day!

8 0
3 years ago
On one day, 4 chefs and 5 helpers earned $650.
Arlecino [84]
4c + 5h = 650 and

5c + 6h = 800 where c are chefs, h are helpers

Start by finding an expression for c

4c + 5h = 650
4c = 650 -5h
c = (650- 5h)/4

Then substitute that into the second equation and solve for a number value for h
5 (650-5h)/4 + 6h = 800
(3250-25h)/4 + 6h = 800
Multiply both sides by 4
3250-25h + 24h = 3200
-h = -50
h = 50

Take that 50 and substitute it into the expression we have for c to get a number value for c

C= 650-5(50)/4
C = 650-250/4
C = 400/4
C= 100

Check your first equations, substituting $50 for the helpers and $100 for the chefs.

4 (100) + 5(50) =
400 + 250 = 650

5(100) + 6(50) =
500 + 300 = 800
6 0
3 years ago
Write the equation of a line in slope-intercept form parallel to the line y = -2x + 7 and contains (-1, 3).
JulsSmile [24]

Answer:

The answer is

<h2>y = - 2x + 1</h2>

Step-by-step explanation:

Equation of a line is y = mx + c

where

m is the slope

c is the y intercept

To find the equation of the parallel line we must first find the slope of the original line

From the question the original line is

y = - 2x + 7

Comparing with the general equation above

Slope = - 2

Since the lines are parallel their slope are also the same

Slope of parallel line = - 2

The equation of the line using point (-1, 3) and slope - 2 is

y - 3  =  - 2(x + 1) \\ y - 3 =  - 2x - 2 \\ y =  - 2x - 2 + 3

We have the final answer as

y =  - 2x + 1 \\

Hope this helps you

7 0
3 years ago
If y varies directly as x, and y is 20 when x is 4, what is the constant of variation for this relation?
yuradex [85]
Y
y=ax
where a is a constant of proportionality;
y=20, x=4
20=4a
a=20/4
a=5
y=5x
The constant of variation is 5
3 0
3 years ago
Factor
AfilCa [17]

Answer:

The answer is 6ab³c(3ab + 4c)

Step-by-step explanation:

You have to collect the like-term :

18a²b⁴c + 24ab³c²

= 6(3a²b⁴c + 4ab³c²)

= 6a(3ab⁴c + 4b³c²)

= 6ab³(3abc + 4c²)

= 6ab³c(3ab + 4c)

6 0
2 years ago
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