All categories

3 years ago

Evaluate the expression 6x+8 when x=2 .

Mathematics

1 answer:

snow_lady [41]3 years ago

5 0

Answer:

Step-by-step explanation:

plug in the numbers

6 times 2 + 8 = 20

You might be interested in

Write two expressions with the solution set of {5}, (make it simple)

Montano1993 [528]

I have no idea ☠️ i just need to answer questions to be able to ask questions

4 0

2 years ago

guys, pleasee please can somebody who is good at school help me please, im failing, im behind and my mom is going to hit me agai

hodyreva [135]

Answer:

wha-

Step-by-step explanation:

usususujsjsjsjsisiisjs

3 0

2 years ago

What is the value of the expression 44? Please help I only have an hour! I will give brainliest!

Eduardwww [97]

Answer:

256

Step-by-step explanation:

The value is 256 because 4^4 is 4*4*4*4 which equals 256 :))

Hope this helps:)) Plz mark Brainliest :))

7 0

3 years ago

5(7 + 3x) - 12 how to simplify

motikmotik

To solve this we need to use this formula:

a(b+c)=ab+ac

5(7+3x)-12=35+15x-12=15x+23

6 0

3 years ago

Read 2 more answers

Pls solve the simultaneous equation in the attachment.

siniylev [52]

Answer:

Part a) The solution is the ordered pair (6,10)

Part b) The solutions are the ordered pairs (7,3) and (15,1.4)

Step-by-step explanation:

Part a) we have

$\frac{x}{2}-\frac{y}{5}=1$ ----> equation A

$y-\frac{x}{3}=8$ ----> equation B

Multiply equation A by 10 both sides to remove the fractions

$5x-2y=10$ ----> equation C

isolate the variable y in equation B

$y=\frac{x}{3}+8$ ----> equation D

we have the system of equations

$5x-2y=10$ ----> equation C

$y=\frac{x}{3}+8$ ----> equation D

Solve the system by substitution

substitute equation D in equation C

$5x-2(\frac{x}{3}+8)=10$

solve for x

$5x-\frac{2x}{3}-16=10$

Multiply by 3 both sides

$15x-2x-48=30$

$15x-2x=48+30$

Combine like terms

$13x=78$

$x=6$

Find the value of y

$y=\frac{x}{3}+8$

$y=\frac{6}{3}+8$

$y=10$

The solution is the ordered pair (6,10)

Part b) we have

$xy=21$ ---> equation A

$x+5y=22$ ----> equation B

isolate the variable x in the equation B

$x=22-5y$ ----> equation C

substitute equation C in equation A

$(22-5y)y=21$

solve for y

$22y-5y^2=21$

$5y^2-22y+21=0$

Solve the quadratic equation by graphing

The solutions are y=1.4, y=3

see the attached figure

Find the values of x

For y=1.4

$x=22-5(1.4)=15$

For y=3

$x=22-5(3)=7$

therefore

The solutions are the ordered pairs (7,3) and (15,1.4)

3 0

3 years ago