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Anna007 [38]
3 years ago
13

If f(x) = −4x 2 + 15, then f(−3)

Mathematics
2 answers:
xxTIMURxx [149]3 years ago
8 0

Answer:

-21

Step-by-step explanation:

f(-3) = -4(-3)² + 15 = -4(9) + 15 = -36 + 15 = -21

MArishka [77]3 years ago
3 0

Answer:

f(-3) = -21

Step-by-step explanation:

f(x) = −4x²+ 15

f(-3) = -4(-3)² + 15

f(-3) = -4(9) + 15

f(-3) = -36 + 15

f(-3) = -21

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Write an equation of a line parallel to line GH below in slope-intercept form that passes through the point (−5, 6). Line GH is
telo118 [61]
Answer:
y = x + 11

Explanation:
The general form of an equation is:
y = mx+c
where:
m is the slope
c is the y-intercept
1- getting the slope:
We are given that the line is parallel to GH. This means that:
slope of the line = slope of GH
We have G as (-2,2) and H as (2,6)
slope of GH = (y2-y1) / (x2-x2)
slope of GH = (6-2) / (2--2) = 1
slope of line = slope of GH =1 
Therefore, the equation on the line now becomes:
y = x + c
2- getting the y-intercept:
We are given that point (-5,6) passes through the line. This means that this point satisfies the equation of the line. So, we will substitute with this point in the equation and solve for c as follows:
y = x + c
6 = -5 + c
c = 6_5
c = 11

Based on the above, the equation of the line is:
y = x + 11

Hope this helps :)
7 0
3 years ago
Thomas rents a car for his vaccation the milliage included with the 54 miles forer every mile he drives over 54 miles he needs t
Sauron [17]

Answer:

$27

Step-by-step explanation:

Thomas rents a car for his vacation. The mileage include with the rental is 54 miles. For every mile he drives over 54 miles, he needs to pay $1 4/5. If he drives 69 miles, how much extra does he need to pay?

Total mileage included with the rental = 54 miles

Additional cost per mile after 54 miles = $1 4/5

Total miles Thomas drives = 69 miles

Extra miles Thomas drives = 69 miles - 54 miles

= 15 miles

how much extra does he need to pay?

Extra cost Thomas needs to pay = Additional cost per mile after 54 miles * Extra miles Thomas drives

= $1 4/5 * 15 miles

= 9/5 * 15

= (9 * 15) / 5

= 135/5

= 27

Extra cost Thomas needs to pay = $27

4 0
3 years ago
Which ordered pair is a solution to the equation y=-2/5x+9
Vladimir79 [104]

Answer:

c

Step-by-step explanation:

i am not sure i but i think it is

6 0
3 years ago
PLZ HELP!!! Will mark brainliest. I need answer as soon as possible because im being timed! I need b and c. Thank you!
rjkz [21]

Answer:

Step-by-step explanation:

B part

the variability of the two distributions appears to be about the same.

C part

. /. = .

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4 0
3 years ago
Cesar comenta que su papa esta interesado en comprar un terreno o vivienda.En estos tiempos de cuarentena su padre ha aprendido
quester [9]

Answer:

El área de la casa es de 1,304 m²

Step-by-step explanation:

De las dimensiones dadas en línea, tenemos que el área del jardín = 640 m²

Las dimensiones del jardín son;

Longitud = 40 m.

Ancho = a m

Por lo tanto, 40 × a = 640

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La dimensión del compuesto es así;

Longitud = 40 + 14 = 54 m

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El área del compuesto = Área de la casa + Área del jardín

El área del compuesto = Ancho del compuesto × Longitud del compuesto

El área del compuesto = 36 × 54 = 1,944 m²

∴ 1,944 m² = Área de la casa + Área del jardín

1,944 m² = Área de la casa + 640 m²

Área de la casa = 1,944 m² - 640 m² = 1,304 m²

El área de la casa = 1,304 m².

3 0
3 years ago
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