3 years ago

Let f(x) = 2x + 2. solve f-1 (x) when x=4

1 answer:

6 0

If we let f(x)=2x+2 and solving for f-1(x) when x=4

f-1(x)=2(4)+2=10-1=9

Hope this helps. Any questions please just ask. Thank you.

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Elina [12.6K]

Answer:

C.) 5

Step-by-step explanation:

If beth were 5 ( Making Julio 3)

Gerald is 10 and Debra is 20

10+20+5+3 = 38

I hope this helps you :)

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3 years ago

What are the solutions to the quadratic equation 98-x2=0

kifflom [539]

$98-x^2=0\qquad\text{add}\ x^2\ \text{to both sides}\\\\98=x^2\to x^2=98\\\\x=\pm\sqrt{98}\\\\x=\pm\sqrt{49\cdot2}\\\\x=\pm\sqrt{49}\cdot\sqrt2\\\\\boxed{x=-7\sqrt2\ \vee\ x=7\sqrt2}$

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3 years ago

The senior classes at High School A and High School B planned separate trips to Lake Compounce. The senior class at High School

storchak [24]

Answer:

Number of students in vans =15 and bus =46

Step-by-step explanation:

use variables for the vans and buses

let x= vans and y=buses

Now solve the 2 equations simultaneously

remember to number your equations

6x+7y=412..........1

6x+9y=504.........2

make x the subject of one equation

and label it equation 3

6x=412—7y

$x = \frac{206}{3} - \frac{7y}{6} .............3$

subs 3 into 2

$6( \frac{206}{3} - \frac{7y}{6} ) + 9y = 504$

$412 - 7y + 9y = 504$

$- 7y + 9y = 504 - 412$

$2y = 92$

$y = 46...................4$

subs 4 into 1

$6x + 7(46) = 412$

$6x + 322 = 412$

$6x = 412 - 322$

$6x = 90$

$x = 15$

Therefore there are 15 students in each van and 46 students in each bus.

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2 years ago

9+x/15=10 What is happening to the variable? How do you solve for the variable?

Katarina [22]

Answer:

The variable x is being divided by 15 in the equation and x=15

Step-by-step explanation:

To solve for x we :

9+x/15=10

x/15=1

x=15

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3 years ago

Solve for x pls help

zepelin [54]

Your answer would be

A) 20.3

i am not sure about this but yeah also can i have brainliest

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3 years ago