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Alex777 [14]
2 years ago
5

Is y=3x^2-x-1 a function

Mathematics
1 answer:
NARA [144]2 years ago
7 0

Answer: Yes it is a function.

This is because any x input leads to exactly one y output.

The graph passes the vertical line test. It is impossible to draw a single vertical line through more than one point on the parabolic curve.

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The period T of a pendulum in seconds depends on its length L in feet, and is given by the formula T=
Damm [24]
This is a matter of plugging in. Specifically 7 for L.

T = 2πsqrt(7/32)
T = (6.28319...)(0.46771...)
T is about 2.93871 seconds
4 0
2 years ago
Pawl,colin and bria are waiters. One night the restaurant earns tips totalling £78.40 the share the tips in the ratio 2.1.5 how
stellarik [79]

Answer:  Brian gets $39.2 more over Colin.

Step-by-step explanation:

Given: Total tip amount = £78.40

The ratio of the share of tips for Pawl, Colin and Bria  is 2:1 :5.

Let tip amount for Pawl = 2x, tip amount for Colin = x , tip amount for Bria = 5x

Then, 2x+x+5x= 78.40

\Rightarrow\ 8x = 78.40\\\\\Rightarrow x=\dfrac{78.40}{8 }\\\\\Rightarrow x=9.8

Tip for Colin = $ 9.8 , Tip for Bria = 5($9.8)= $49

Difference = $(49-9.8) = $ 39.2

Hence, Brian gets $39.2 more over Colin.

4 0
3 years ago
You deposit $7200 in an account that pays 9.3% interest compounded yearly. Find the balance after 9 years.
inysia [295]

Answer:

c

Step-by-step explanation:

6 0
2 years ago
If one pack of blueberries cost $4, how many packages of blueberries can be bought for $12
Elenna [48]

Answer:

Step-by-step explanation:

One pack blueberries = $4

? Pack blueberries = $12

All you have to do is divide 12 by 4 :)

8 0
3 years ago
Please help ill give brainliest
astra-53 [7]

Answer:

y = 7/8x + 1

Step-by-step explanation:

According to y = mx + b, whereas b is the y-intercept

so if b is positive, b has to be larger than 0

A non-proportional graph is a straight line that does not go through the origin so

The #1 and #4 are wrong because they are proportional

The #2 and #4 are wrong because they have negative y-intercept

3 0
2 years ago
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