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lakkis [162]
3 years ago
6

Please help ASAP!ill give brainliest !

Mathematics
1 answer:
Vinil7 [7]3 years ago
5 0
The vertex is at (0, 3) so y=a(x-0)²+3, which is y=ax²+3
next, use a given point to find a: 10=a(3)²+3, so 9a=7, a=7/9
the equation is then y=\frac{7}{9}x^2+3

as for the first question, the shape is an ellipse, the domain is -5≤x≤5, the range is -3≤y≤3 

the equation can be written as :\frac{x^2}{25}+ \frac{y^2}{9} =1
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Liam is a tyre fitter it takes him 56 minutes to fit 4 tyres to a van if he works for 42 minutes how many tyres can he fit.
dlinn [17]
I think the answer is 2 tyres but i am not sure but don’t blame me if it’s wrong
5 0
2 years ago
How many three-digit phone prefixes that are used to represent a particular geographic area are possible that have no 0 or 1 in
Sonbull [250]

Answer:

The number of possible three-digit phone prefixes that are used to represent a particular geographic area is 640.

Step-by-step explanation:

The phone prefixes used to represent a particular geographic area are a 3 digit code consisting of numbers from 0 to 9.

The prefix code are of the form: <u>x</u> <u>x</u> <u>x</u>

Condition: The first or the second place cannot take values 0 or 1.

Then the first place can be occupied by the remaining 8 digits.

Similarly the second place can also be occupied by the remaining 8 digits.

And the third place can be occupied by any of the 10 digits.

So the number of ways to construct a phone prefix for any area is:

Possible\ number\ of\ phone\ prefixes=8\times8\times10=640

Thus, the number of phone prefixes possible for any area is 640.

4 0
3 years ago
You have torn a tendon and are facing surgery to repair it. the surgeon explains the risks to you: the probability of infection
skad [1K]
P(most favorable outcome) = 1 -(0.03 +0.16 -0.01) = 0.82

_____
"repair fails" includes the "infection and failure" case, as does "infection". By adding the probability of "repair fails" and "infection", we count the "infection and failure" case twice. So, we have to subtract the probability of "infection and failure" from the sum of "repaire fails" and "infection" in order to count each bad outcome only once.

The probability of a good outcome is the complement of the probability of a bad outcome.
5 0
3 years ago
Roselyn wants to drive her car at a speed of 60 miles per hour for 1.25 hours. Her car has a fuel efficiency of 15 miles per gal
EleoNora [17]

Hence, there is 5 gallons of fuel Roselyn needed for her journey.

3 0
3 years ago
The vertex angle of isosceles triangle is 110 degrees. what are the measures of the base angles
dalvyx [7]

Answer:

35°

Step-by-step explanation:

The base angles of an isosceles triangle are congruent , then

base angles = \frac{180-110}{2} = \frac{70}{2} = 35°

3 0
2 years ago
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