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Gelneren [198K]
2 years ago
7

Alg 2 the problem is below please help !!!

Mathematics
1 answer:
KiRa [710]2 years ago
3 0
The answer is: -72.19634511
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consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i
eimsori [14]

we have

f(x)=x^{2} +2x-15

we know that

The x-intercept is the value of x when the value of the function is equal to zero

so

in this problem

Find the roots of the function

equate the function to zero

x^{2} +2x-15=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2} +2x=15

Complete the square. Remember to balance the equation by adding the same constants to each side

x^{2} +2x+1=15+1

x^{2} +2x+1=16

Rewrite as perfect squares

(x+1)^{2}=16

Square root both sides

(x+1)=(+/-)\sqrt{16}

(x+1)=(+/-)4

x=-1(+/-)4

x1=-1+4=3

x2=-1-4=-5

x^{2} +2x-15=(x-3)(x+5)

therefore

<u>the answer is</u>

the x-intercepts are the points (3,0) and (-5,0)

3 0
3 years ago
Read 2 more answers
The length of a car is √185 ft. Will this car fit in a garage that measure 10 ft long? If not that is the minimum length of a ga
Rina8888 [55]
10 is the square root of only 100, so I know that the square root of 185 must be longer.

The square root of 185 is about 13.6 , so the garage must be absolutely
not any shorter than 14-ft, and 15-ft or 16-ft would be even better.
4 0
3 years ago
Between the two investment plans listed below, which will have the greatest future value and by what amount? Round all answers t
Temka [501]

Step-by-step explanation:

To determine the future value for the 401(k), we need to determine the amount contributed annually. It is stated that the amount the employee contributes to the fund is 9% of $45,624. $45,624(0.09) = $4,106.16 The employer contributes a maximum of 3% of the employee contribution. Therefore: $45,624(0.03) = $1368.72.  Therefore, the total annual contribution is $5,474.88, giving a future value of $196,302.40. For the Roth IRA, the monthly contributions are $352.45 giving a future value of $152,636.09. Therefore, the 401(k) has a greater future value by $43,666.31.

4 0
2 years ago
A rectangle has a length of 30 cm and
ss7ja [257]

Answer: 70.6 cm

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The solution to the system of equations is below the ordered pair
Dmitriy789 [7]

Answer:

4

Step-by-step explanation:

20x+160=10x+200

20x-10x=200-160

10x=40

x=4

5 0
3 years ago
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