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3 years ago

Evaluate F(x)=2x^2+5x-16 for x=4

Mathematics

1 answer:

Ratling [72]3 years ago

5 0

Answer:

$36$

Step-by-step explanation:

F(x)=2x^2+5x-16 for x=4

$2(4)^2+5(4)-16 \\ 2 \times 16 + 20 - 16 \\ 32 + 4 = 36$

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Joe collected 94 stamps altogether. He collected 27 in April and 34 in May. How many did he collect in June?

inna [77]

If Joe collected 94 stamps which are in April May and June, we could make an equation like this: A + M + J = All stamps

Plug in the values:
$27 + 34 + j = 94$
Isolate J:
$j = 94 - 27 - 34$
Combine like terms:
$j = 33$
He collected 33 stamps in June.

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3 years ago

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3 years ago

Solve algebraically: <br> Y = x^2 + 5x - 17 <br> Y = x - 5

Ksenya-84 [330]

Answer:

Step-by-step explanation:

What you could do is fill in 2 for the equation and y would equal -3 so for the first one it's like

y= 2^2 + 5(2) -17

y= 4 + 10 - 17 which turns into y= -3

In the second y it would be something like

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3 years ago

Pls help i give u brainliest

GREYUIT [131]

Answer:

The answer is 324π m².

Step-by-step explanation:

Given that the surface area of sphere formula is S.A = 4×π×r² where r is radius. The diameter of sphere is 18m so you have to divide it by 2 to find it's radius :

$radius = diameter \div 2$

$radius = 18 \div 2$

$radius = 9m$

Then substitute into the formula :

$s.a = 4 \times \pi \times {r}^{2}$

$let \: r = 9$

$s.a = 4 \times \pi \times {9}^{2}$

$s.a = 4 \times \pi \times 81$

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3 years ago

Read 2 more answers

Help me please I’ll give a lot of points

Alenkasestr [34]

Answer:

21. B

22. D

23. C

24. y = 3x - 12

Step-by-step explanation:

21. it has to be a positive slope since the graph shows it is increasing/positive slope. Has to be A or B. But it isn't A because where x = 1 1/2, y doesn't equal 0 like the graph shows.

22. It is D if you rewrite the equation starting with y=, so you subtract 2x on both sides to get y = -2x +6. Parallel means slopes are the same, so the slope has to be -2, which is D.

23. The only one that fits the description is C.

24.

in standard form, rearrange the equation so only y is on one side, the rest on the other.

-4x + 2y = 2x - 24

first add 4x on both sides so -4x cancels out on the left hand side.

-4x + 4x + 2y = 2x + 4x - 24

simplify it and get 2y = 6x - 24

divide both side by 2

y = 3x - 12

plot this as shown with arrows on lines.

please give thanks :)

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3 years ago