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Soloha48 [4]
3 years ago
8

Which statement is correct about the function y = x2 – 2x – 143?

Mathematics
2 answers:
mars1129 [50]3 years ago
6 0
C is the correct answer. hope it helps. :)
Lelu [443]3 years ago
5 0

Answer:

In factor y=(x-13)(x+11) and The zeros are x=13 and x=-11

C is correct.

Step-by-step explanation:

Given: y=x^2-2x-143

Factor the function,

y=x^2-2x-143

y=(x^2-13x)+(11x-143)

y=x(x-13)+11(x-13)

y=(x-13)(x+11)

Factor of the given function is (x-13)(x+11)

If we find the zeros of the function, we will set each factor to zero.

x-13 = 0     and     x+11=0

x=13,-11

The zeros of the function are 13 and -11

Hence, In factor y=(x-13)(x+11) and The zeros are x=13 and x=-11

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The ratio of boys to girls in a classroom is 5:6. If there are 55 students in total, how many more girls are there than boys?
KATRIN_1 [288]

Answer: there are 5 more girls than boys.

Step-by-step explanation:

The ratio of boys to girls in a classroom is 5:6. The total ratio is the sum of the proportion. It becomes 5 + 6 = 11

If there are 55 students in total, it means that the number of boys in the class is

5/11 × 55 = 25 boys

Also, the number of girls in the class is

6/11 × 55 = 30 girls

Therefore, the difference between the number of girls and boys in the class is

30 - 25 = 5 girls

4 0
3 years ago
What is the slope intercept form of 9x - y = 9
vesna_86 [32]
Slope intercept form= y=mx+b.
y=9x-9



8 0
4 years ago
Read 2 more answers
Make v the subject of the formula in H=m(v²-u²)/2gx​
goldfiish [28.3K]

Answer:

v=\sqrt{\dfrac{H\times 2gx}{m}+u^2}

Step-by-step explanation:

The given formula is :

H=\dfrac{m(v^2-u^2)}{2gx}

We need to find the formula for v.

Cross multiplying the given formula.

H\times 2gx=m(v^2-u^2)

Dividing both sides by m. So,

\dfrac{H\times 2gx}{m}=\dfrac{m(v^2-u^2)}{m}\\\\(v^2-u^2)=\dfrac{H\times 2gx}{m}

Adding both sides by u².

(v^2-u^2)+u^2=\dfrac{H\times 2gx}{m}+u^2\\\\v^2=\dfrac{H\times 2gx}{m}+u^2\\\\\text{So},\\\\v=\sqrt{\dfrac{H\times 2gx}{m}+u^2}

Hence, this is the required formula.

4 0
3 years ago
What is the measure of angle C A B?
Mamont248 [21]

angle BCA would be 60, so 50 + 60 = 110, so angle CAB would be 70

8 0
3 years ago
Suppose you have a job teaching swimming lessons and get paid $6 an hour. You also have job as cashier and get paid $8 and hour.
VikaD [51]
This is a system of equations problem.

L =  Hours of Swim Lessons
C = Hours as Cashier

L + C = 15        This is an equation for working 15 hours total.
so
L = 15-C

6L + 8C = 100   This is an equation for making at least $100.
so
6 (15-C) + 8C = 100    *You substituted 15-C for L here
90 - 6C + 8C = 100      Distribute
90 + 2C = 100
2C = 10
C = 5          You can work 5 hours as a cashier

L + C = 15
L + 5 = 15
L = 10          You can work 10 hours teaching swimming lessons.

If you want to make EXACTLY $100 you would work 5 hours as cashier and 10 hours teaching swimming lessons.

HOWEVER, the question says AT LEAST $100 and NOT MORE than 15 hours per week. Since you make more money as a cashier, any work over 5 hours will help you make over $100.

As long as you work at least 5 hours as a cashier and any remaining hours teaching swimming lessons, you will make over $100.

5 cashier, 10 swimming
6 cashier, 9 swimming
7 cashier, 8 swimming...

Mr. Pacey
JH/HS Social Studies Teacher
(but I've also helped with Math Team for JH & HS)
4 0
3 years ago
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