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mina [271]
3 years ago
10

Solve 3x − x + 2 = 12. −5 4 7 5

Mathematics
2 answers:
jarptica [38.1K]3 years ago
8 0
Combine like terms:

3x - x = 2x
2x + 2 = 12

Subtract 2 from both sides:

2x = 10

Divide both sides by 2 to get x by itself:

x = 5

The value of x is 5.
Papessa [141]3 years ago
4 0
Judging by the question I noticed that I can simplify the equation 3x-x+2=12 by one step.
The outcome of simplification should be 2x+2=12.

Next you must subtract 2 from both sides to isolate the x. The new equation should be 2x = 10.

Lastly you must divide both sides by 2, the answer you should get is x=5, D.
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A student drove to the university from her home and noted that the odometer reading of her car increased by 16.0 km. The trip to
notka56 [123]

Answer:

Average speed is 48 km per hour

Step-by-step explanation:

A student drove to the university from her home and noted that the odometer reading of her car increased by 16.0 km. The trip took 20.0 min. (a) What was her average speed? in km/hr

Distance traveled is 16 km and the time taken is 20 minutes

convert minutes into hour. to convert minutes into hour we divide by 60 because 1 hour = 60 minutes

\frac{20}{60} =\frac{1}{3}

so time = 1/3  and distance = 16

Average speed = distance by time

speed =\frac{16}{\frac{1}{3} } =\frac{48}{1}= 48

Average speed is 48 km per hour

4 0
3 years ago
If f(x)=2x+5, then what is f(3)?
FromTheMoon [43]

Answer:

\Large \boxed{f(3)=11}

Step-by-step explanation:

f(x)=2x+5

For f(3), the input for the function f(x) is 3.

Let x (input) = 3.

f(3)=2(3)+5 \\\\ f(3)=6+5 \\\\ f(3)=11

7 0
2 years ago
Read 2 more answers
The value of y varies directly with x. When y = 25, x = 6 1/4. What is the value of y when x is 12? 4
elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

if y = 25 when x = 6 1/4, then when y = 12, that would mean that we divided 25  by 2.0833. So we can do 6 1/4 divided by 2.0833 is the answer which is 3.00004800077.

(i think)

(probably wrong)

6 0
2 years ago
For what value of x is line a parallel to line b?<br><br> (Yo, please help me so I can go to sleep.)
iogann1982 [59]
X=20

If they're parallel the other number in the same spot as 5x+15 equals that, so 5x+15=115 because if they are parallel they're the same if same spot and same line going through them.

115-15 = 100
5x=100
Divide by 5 both sides
X=20

If x=20 then these lines would be parallel
6 0
3 years ago
Are the given ratios equivalent Explan why or why not 3 : 5 12 : 20​
sasho [114]
Yes you take 3 times 4 and receive 12 and 5 times 4 and receive 20
4 0
2 years ago
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