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tigry1 [53]
3 years ago
12

Simplify 2x2 - y for x= 3 and y=-2.

Mathematics
1 answer:
amm18123 years ago
7 0

Answer:

<u>14</u>

Step-by-step explanation:

Plug and chug

<em>2</em>

<em>8*(3)*2 - (-2) </em>

12 - (-2)

14

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The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At which points d
alexandr402 [8]

Answer:

x = -8 and x = 4

Step-by-step explanation:

given

f(x) = (x+8) (x - 4)

recall that at any point on the x-axis, y = 0 [i.e f(x) = 0]

hence to find where the graph crosses the x-axis, we simply substitue f(x) = 0 into the equation and solve for x

f(x) = (x+8) (x - 4)

0 = (x+8) (x - 4)

Hence

either,

(x+8) = 0 ----> x = -8  (first crossing point)

or

(x-4) = 0 ------> x = 4 (second crossing point)

Hence the graph crosses the x-axis at x = -8 and x = 4

7 0
3 years ago
Work out 7/10 + 8/15 is. Give your answer as a mixed number in its simplest form.
san4es73 [151]

Answer:

1\frac{7}{30}

Step-by-step explanation:

\frac{7}{10}+\frac{8}{15}\\ \\ \frac{21}{30}+\frac{16}{30}\\\\\frac{37}{30}\\\\1\frac{7}{30}

6 0
2 years ago
Read 2 more answers
Does anyone know this, I’m like confused, it’s geometry
LenKa [72]

#6 is 210

Step-by-step explanation:

Just rememder that the circles are 360 degrees

5 0
3 years ago
PLEASE Answer I WILL MARK You BRAINLIST if you show your work
N76 [4]
The answer is 8 because if you look she made $40 in 5 hours. $40 divided by 5 is 8. Also she made $80 in 10 hours. 80 divided by 10 is 8!!
3 0
3 years ago
A generator runs for 2 1/2 hand uses 4 3/8 gals of fuel. How many gallons of fuel did the generator use each hour?
krok68 [10]

divide gallons used by time

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5 0
3 years ago
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