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Evgen [1.6K]
2 years ago
12

Ten times the sum of three and number is -21. what is the number?

Mathematics
2 answers:
serg [7]2 years ago
4 0

Answer:

7? 7 x -3 21

Step-by-step explanation:

enot [183]2 years ago
3 0
10(x+3) = -21

-51/10

Mark brainliest please
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The following figures are not drawn to scale but AB and CD are straight lines. Find x
astraxan [27]

Answer:

x=45

Step-by-step explanation:

Since AB is a straight line, it is 180 degrees

AOE + EOF + FOD + DOB = 180

15+x+2x+120-2x = 180

Combine like terms

135 +x = 180

Subtract 135 from each side

135-135 +x = 180 -135

x = 45

5 0
3 years ago
If 4 students represent 16% of the class then how many students are in the class
kobusy [5.1K]

Answer:

In total there are 25 students in the class.

6 0
3 years ago
The price of one gallon of milk has increased from$3.24 to $4.06. What is the percentage increase
AlladinOne [14]
25.3% 

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8 0
3 years ago
Can get some help on 2,4,22, 42 and 50 please
Fittoniya [83]

Answer:

2. zeros

4. difference

22. 79,158.5

42. 0.0099

50. 4.37

Step-by-step explanation:

2. Only adding 0s after a decimal point does not change the value.

4. Since you are subtracting then you estimate difference.

22. Add each number using place value.

75285

        2

  3971

        0.5

__________

79258.5

42. 0.01 is really 0.0100. If you subtract 0.0001 then it is like subtracting 100-1 = 99 but in the decimal place. So it becomes 0.0099.

50. Subtract by lining up decimal places. Then move place values to subtract.

      9.00

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----------------

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6 0
3 years ago
Solve the system.<br> 2x+y = 3<br> -2y = 14 - 6x
bezimeni [28]

Answer:

The solution is: (2, -1)

Step-by-step explanation:

First we rewrite the second system equation

-2y = 14 - 6x   →   6x-2y=14

Now we have the following system of equations:

2x+y = 3

6x-2y=14

To solve the system multiply the first equation by -3 and add it to the second equation

-6x+-3y = -9

6x-2y=14

--------------------------------------

0-5y=5

y=-1

Now we substitute the value of y in the first equation and solve for x

2x-1 = 3

2x= 4

x= 2

The solution is: (2, -1)

5 0
3 years ago
Read 2 more answers
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