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3 years ago

2x + 4 = 3x - 2 a. -2 b. 7 c. 3 d. 6

Mathematics

2 answers:

blsea [12.9K]3 years ago

7 0

The answer is 6.

2x + 4 = 3x - 2
-2x -2x
————————
4 = x - 2
+2 +2
—————
6 = x

Greeley [361]3 years ago

7 0

Answer:

x = 6

Step-by-step explanation:

2x + 4 = 3x - 2 (subtract 4 from both sides)

2x = 3x - 2 - 4 (subtract 3x from both sides)

2x -3x = - 2 - 4 (evaluate both sides)

-x = - 6 (multiply both sides by -1)

x = 6

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A machine worked for 5 hours and used 4 kilowats if electricity. The machine used ------ of a kilowatt each hour it worked.

slega [8]

Answer:

0.8 kilowatt/hour

Step-by-step explanation:

divide 4/5, gives you .

8 0

3 years ago

What is the difference between the mean of each set? a) 4 b) 5 c) 7 d) 9

Xelga [282]

Mean is the average

So the first mean is 11
The second one is 14.7 so round to 15

15-11 is 4. Hope that is correct

7 0

3 years ago

Read 2 more answers

Which expression is equivalent to -9(x – 4) – 6x?

kvv77 [185]

= -9(x – 4) – 6x
Multiply -9 by everything in parentheses first

= (-9*x) + (-9*-4) - 6x
= -9x + (36) - 6x

Combine like terms
= (-9x-6x) + 36

= -15x + 36

The middle choice is the answer:
-15x + 36

Hope this helps! :)

3 0

3 years ago

Can you help me please

STALIN [3.7K]

Answer:

Step-by-step explanation:

Here we a given a rule

It say

$x(y$ ÷ $3)^2$

And we are given the values of x and y as

x=4 and y = 9

Let us replace them in the rule we are provided with

$4(9$ ÷ $3)^2$

Applying DMAS rule, which says, first Division ollowed by Multiplication addition and then subtraction .

We first divide 9 by 3

9÷3 = 3

Hence

$4(9$ ÷ $3)^2 = 4(3)^2$

Now we square first

$3^2 = 3 \times 3 = 9$

$4(3)^2 = 4 \times 9$

$4(3)^2 = 36$

Hence our final answer will be 36

4 0

3 years ago

A student works for 80 hours each month and plans to work for 5 hours each day, but only on days when scheduled to work. The fun

Greeley [361]

Answer:

C. The value of f (4) is 60, and it represents the number of hours of work remaining for the month after working for 4 days

Step-by-step explanation:

So 5 time 4 equals 20...!

80 minus 20= 60

3 0

3 years ago