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oksano4ka [1.4K]
2 years ago
12

Find g of f for f=7x+5 and g(x)=5x^2+4x-3

Mathematics
1 answer:
madreJ [45]2 years ago
7 0
Basically (g of f)x=(f(g(x)) so
g of f=f(g(x))=7(5x^2+4x-3)+5
distribute
f(g(x))=35x^2+28x-21+5=35x^2+28x-16

g of f=35x^2+28x-16
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Help if possible.
skelet666 [1.2K]
A ) Length = 5 - 2 x
Width = 3 - 2 x
The area of the bottom:
A = L  x  W = ( 5 - 2 x ) ( 3 - 2 x ) = 15 - 10 x - 6 x + 4 x² = 
= 4 x² - 16 x + 15
b ) 4 x² - 16 x + 15 = 10
4 x² - 16 x + 5 = 0
x = (16 - √(256 - 80))/ 8 = ( 16 - 13.266 ) / 2
x = 0.34 in
4 0
3 years ago
Pls help I’ll brainlest ASAP and add extra points I’m failing
Step2247 [10]

Step-by-step explanation:

you drew already the right things, you have everything.

so, what is the problem ?

the most common form of line equation is

y = ax + b

a is the slope of the line. it is expressed as the ratio

y coordinate change / x coordinate change

when going from one point to the other.

b is the y-intercept (the y value when x = 0).

once we have the slope, we get b by using the coordinates of one of the given points as x and y in the equation and solve for b.

so, for the 2 marked points you showed correctly the differences :

x changes by +8 (from -4 to 4).

y changes by -2 (from 3 to 1).

so the slope is -2/+8 = -1/4

the y-intercept we also see directly in the chart : +2.

3 0
2 years ago
Which table represents a linear function
Vilka [71]
Table D represents a linear function.
4 0
3 years ago
Can some one plz help I don't know how to do this
prohojiy [21]
This is a hard one so what you do is make a number line and put -5x, -9, and -24 hope this helps
4 0
3 years ago
Josh swam 25 laps in 50 minutes. At that rate, how long will it take to swim 35 laps?
GrogVix [38]

Answer:

70 Minutes

Step-by-step explanation:

Divide 25 into 50 to get 2 and then multiply 2 x 35 to get 70

7 0
2 years ago
Read 2 more answers
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