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Anni [7]
3 years ago
5

What is the value of f(x) = 9x when x = -2? i think its 1/81

Mathematics
1 answer:
strojnjashka [21]3 years ago
7 0
\text{We know:} \ \\ \\ f(x) = 9x \\ \\ \text{when x = -2 we have :} \\ \\ f(-2) = 9 \cdot (-2) \\ \\ f(-2)=-18
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Which of the following is solution set of 4x = y and 2x2 − y = 0? A. {(0.5, -0.5), (2, -8)} B. {(0, 0), (2, 8)} C. {(1.5, 2), (8
sergiy2304 [10]
4x = y
2x^2 - y = 0
2x^2 - 4x = 0
2x(x - 2) = 0
2x = 0 or x - 2 = 0
x = 0 or x = 2

y = 4(0) or y = 4(2)
y = 0 or y = 8

Therefore, solution set is {(0, 0), (2, 8)}
7 0
3 years ago
A light bulb consumes 9450 W in five days in six hours how many watt hours does a consume per day?
KengaRu [80]
Well first 9450/5=1890 then 1890/6= 315 watt hours per day
5 0
3 years ago
Help me out some one
Olegator [25]
Y = mx + b is the slope-intercept form of the equation of a line,
where m = slope, and b = y-intercept.

In problems 1 and 3, your equations are written in the y= mx + b form, so you can read the slope and y-intercept directly.

1.
m = -5/2
b = -5

3.
m = -1
b = 3

5.
For problem 5, you need to solve for y to put the equation
in y = mx + b form. Then you can read m and b just like we did
for problems 1 and 3.

4x + 16y = 8

16y = -4x + 8

y = -4/16 x - 8/16

y = -1/4 x - 1/2

m = -1/4

b = -1/2
7 0
3 years ago
How many times do you need to regroup to subtract 847-268? How do you know?
Andrej [43]

Answer:

You can regroup it 3 times and a remainder of 43. :) hope it helped!

Step-by-step explanation:

6 0
2 years ago
Find the length of YZ
emmainna [20.7K]
Larger triangle’s base length

a^2 + b^2 = c^2
a^2 + 3^2 = 8^2
a^2 = 8^2 - (3^2)
sqrt(a^2) = sqrt(55)
a = sqrt(55)
__________________

Smaller triangle’s base length:

The same formula applies.
a^2 + 3^2 = 5^2
a^2 = 5^2 - (3^2)
sqrt(a^2) = sqrt(16)
a = 4
____________

The finale!

Add the two side lengths of a, which is sqrt(55) + 4 (exact answer)
or... 11.416 (unrounded to thousandths place)

Good luck to you!
5 0
2 years ago
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