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lyudmila [28]
3 years ago
12

When f ( x ) = 9 x 2 + x − 5 , evaluate f ( − 4

Mathematics
2 answers:
Ganezh [65]3 years ago
6 0
F ( x ) = 9 x 2 + ( -4 ) - 5. 18 - 4 - 5. 12-5. 7
Sloan [31]3 years ago
4 0

Answer:

is that supposed to be a squared x?

9(-4)^2 + (-4) - 5 = 135

9(-4) × 2 + (-4) - 5 = -81

id.k which one is right sorry

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1. The total number of seats in an auditorium is modeled by f(x) = 2x2 – 6x, where x represents the number of rows. How many row
irakobra [83]

Answer:

Jose's solution is not correct, the auditorium has 16 rows

Step-by-step explanation:

we have

f(x)=2x^{2} -6x

where

f(x)------> is the total number of seats in an auditorium

x----> represents the number of rows

How many rows are there in the auditorium if it has a total of 416 seats?

Find the value of x for f(x)=416 seats

substitute the value of f(x) in the equation

416=2x^{2} -6x

2x^{2} -6x-416=0

Using a graphing calculator

The values of x are x=-13, x=16

The solution is

x=16 rows because the number of rows can not be a negative number

8 0
3 years ago
8 3/4 +n+ 2 3/8 +23 1/8 <br> solve for n
bezimeni [28]
8 3/4+n+2 3/8+ 23 1/8
8 3/4+n+ 25 4/8
35/4+ n+ 204/8
70/8 +n+ 204/8
274/8 +n
n= -274/8= -25 1/2
4 0
3 years ago
Solve: -(19/2) ÷ 38/7
Luden [163]

Answer:

(-1)/28

Step-by-step explanation:

Simplify the following:

((-19)/2×1/38)/7

(-19)/2×1/38 = (-19)/(2×38):

((-19)/(2×38))/7

(-19)/(2×38)×1/7 = (-19)/(2×38×7):

(-19)/(2×38×7)

The gcd of -19 and 38 is 19, so (-19)/(2×38×7) = (19 (-1))/(2 (19×2) 7) = 19/19×(-1)/(2×2×7) = (-1)/(2×2×7):

(-1)/(2×2×7)

2×2 = 4:

(-1)/(4×7)

4×7 = 28:

Answer: (-1)/28

3 0
3 years ago
miss Holman gave a 90 cent tip to a waitress for serving a meal costing $6.00. What percent of the bill was her tip. Please show
lara [203]

Answer:

Percent of bill that was tip = 15%

Step-by-step explanation:

Tip = 90 cent

Price of meal = $6.00

Converting dollar to cent

1 cent = 1/100 dollar

90 cent = 90/100 dollar = 0.9 dollar

Percent of bill that was tip = Tip/Price of meal * 100

Percent of bill that was tip= 0.9/6 * 100%

Percent of bill that was tip = 15%

5 0
3 years ago
Read 2 more answers
Please answer CORRECTLY !!!!!!!! Will mark BRAINLIEST !!!!!!!!!
anygoal [31]

Answer:

-(x+7)/6

Step-by-step explanation:

y = -6x-7

Exchange x and y

x= - 6y-7

Solve for y

Add 7 to each side

x+7 = -6y-7+7

x+7 = -6y

Divide by -6

(x+7) / -6 = -6y/-6

(x+7)/ -6 = y

The inverse is -(x+7)/6

3 0
3 years ago
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