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zalisa [80]
4 years ago
15

Evaluate 2х^2 - 1 when x= 3. ОА. 25

Mathematics
2 answers:
xxMikexx [17]4 years ago
8 0

Answer:18

Step-by-step explanation:

Luba_88 [7]4 years ago
7 0
If you did pemdas then 3^2 would equal 9 times 2 would be 18
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Solve the equation. x/5+9 = 4
Burka [1]
If you want to solve the equation x / 5 + 9 = 4, then you'll have to make x be on it's own, like this: x = -5 * 5, which gives us -25! Hope this helped! Brainliest is always appreciated.
3 0
3 years ago
Use any model you choose to solve the story problem. The pet store owner uses one dose of algae solution in the aquarium for eac
Musya8 [376]
Your answer will be 20


5 0
3 years ago
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A rope is cut into three pieces of different lengths. The first piece is of length x meters, The length of the second piece is 2
Iteru [2.4K]

Answer:

first piece = 5 m

second piece = 2(5) + 2 = 12 m

third piece = 3(2x + 2) = 6(5) + 6 = 36 m

Step-by-step explanation:

The question is incomplete, the length of the actual rope is unknown but it should be given . Let us assume the length of the rope is 53 meters.

The rope is cut into 3 pieces of different length.

first piece = x

second piece = 2x + 2

third piece = 3(2x + 2) = 6x + 6

Since the length of the actual rope is assumed to be 53 meters .The length of the first piece, second piece and third piece can be calculated as follows.

we add the length of the pieces to get the actual length of each piece. Therefore,

x + 2x + 2 + 6x + 6 = 53

collect like terms

9x + 8 = 53

9x = 53 - 8

9x = 45

x = 45/9

x = 5 meters

first piece = 5 m

second piece = 2(5) + 2 = 12 m

third piece = 3(2x + 2) = 6(5) + 6 = 36 m

5 0
4 years ago
What is the slope of the line?
snow_lady [41]

The slope of the line may be calculated by using the formula:

m = (y2 - y1)/(x2 - x1), where m is the slope, and (x1, y1) and (x2, y2) are two points on the line.

Using the points (0, -1) and (2, 4) shown, we can substitute these values into the formula above to get:

m = (y2 - y1)/(x2 - x1)

m = (4 - (-1))/(2 - 0)

m = 5/2

Therefor, the slope is 5/2.

Another way to think about the slope is in terms of rise/run, that is for a given interval that the x-value 'runs', by how much does the y value 'rise'?

Here, if we take the same two points (0, -1) and (2, 4), we can see that the x-value has moved 2 units, and the y-value has increased by 5 units. Thus:

if slope = rise/run, then the slope would be 5/2

Note that you should be careful when using this method if the y-value decreases as x increases; in this scenario, the 'rise' would be a negative value rather than a positive one

5 0
4 years ago
$3,250 is withdrawn at the end of every month from an account paying 4.1% compounded monthly. Determine the previous value of th
love history [14]
Hi there :-)
Use the formula of the present value of annuity ordinary
Pv=pmt [(1-(1+r/k)^(-kn))÷(r/k)]
Pv present value?
PMT 3250
R interest rate 0.041
K compounded monthly 12
N time 30 years

Pv=3,250×((1−(1+0.041÷12)^(−12×30))÷(0.041÷12))=672,601.61

Hope it helps
4 0
4 years ago
Read 2 more answers
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