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sweet-ann [11.9K]
3 years ago
10

If f(x) =4 x-20 , what is f(4)

Mathematics
1 answer:
jolli1 [7]3 years ago
5 0
Answer: -4

Explanation:
f(4) = 4(4) - 20
f(4) = 16 - 20
f(4) = -4
You might be interested in
Triangle ABC has vertices at A(3, 8) , B(11, 8) , and C(7, 12) . Triangle FGH has vertices at F(8, 4) , G(16, 4) , and H(12, 8)
KiRa [710]
Vertices of ΔABC 
A - <span>(3, 8)
</span><span>B - (11, 8)
C - (7, 12)
vertices  of </span>Δ<span>FGH
F - (8, 4)
G - (16, 4)
H - (12, 8) 
after a translation the size nor shape of the triangle changes, every point of the triangle moves the same distance in the same direction. 
if we take point A and F
x coordinates of A = 3 and F = 8
the change that has happened can be noted as 'm'
3 + m = 8
m = 5
this means that the point has moved 5 units to the right
y coordinates of A = 8 and F = 4
change that happened is 'n'
8 + n = 4
n = -4
this means that point has moved 4 units downwards

Therefore the correct answer is </span><span>Translate ​ triangle ABC ​ down 4 units, and then translate ​ triangle ABC right 5 units</span>
3 0
4 years ago
Read 2 more answers
Can you please show me how to do this
tia_tia [17]
The answer in a fraction is 2/5 , the answer in decimal form is 0.4 !
8 0
3 years ago
Please help! Find x, if x^2=2018·2020+1 and x&lt;0.
Flura [38]

Answer:

-2019

Step-by-step explanation:

Well you can calculate it.

2018 * 2020 + 1 = 4076361

Square root is 2019.

Since x is negative, the answer is -2019

6 0
4 years ago
A father is 38 years old. his sons are 13 and 5 years old, and his daughter is 8 years old. In how many years will the father be
nalin [4]

Answer:

6 years

Step-by-step explanation:

So each person's age can be represented as a linear equation, since each year our age increases by 1. It can be represented in the slope-intercept form: y=mx+b. The slope in this case is going to be 1, since the time is going to be years, and each year everyone's age goes up by 1 (of course if you're still alive...) and y-intercept in this case represents their current age.

So the father can be represented as: y=x+38

The sons can be represented as: y = x+13 and y=x+5

The daughter can be represented as: y=x+8

So adding up all his children you get:

(x+13)+(x+5)+(x+8)

This gives you the equation:

3x+26

Now set this equal to the father's age to solve for x (in this context it's years)

3x+26=x+38

Subtract from both sides

2x+26=38

Subtract 26 from both sides

2x=12

Divide both sides by 2

x=6

So in 6 years the father will be the same age as his children put together

8 0
2 years ago
Find f(x)=(x^2)+x+39, when x=50. (don't write a comma in answer.)
GREYUIT [131]

f(x) = x² + x + 39

f(50) = 50² + 50 + 39

f(50) = 2500 + 89

f(50) = <u>2589</u>

7 0
3 years ago
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