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Vsevolod [243]
4 years ago
9

7(-10 + 3x) = -49 Please explain aswell!

Mathematics
1 answer:
bixtya [17]4 years ago
6 0

Answer:

x=1

Step-by-step explanation:

To get the 7 away, we need to multiply it into the parentheses.

7*-10= -70

7*3=21

-70+21x= -49

Now we combine like terms and we move 70 over. Because we're moving it to the other side of the equation, it becomes positive.

21x= -49+70

-49+70 is the same as 70-49

70-49= 21

Now we put it together.

21x=21

To get the x by itself, we need to divide 21 on both sides.

21x/21= 21/21

21/21=1

x=1

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madam [21]
A circle with a radius of 5 units has a circumference of 31.416 units. Hope that helps!
5 0
3 years ago
A line includes the points (0, –6) and (–2, –10). What is its equation in slope-intercept form?
sergiy2304 [10]

Answer:

y = 2x - 6

Step-by-step explanation:

The slope-intercept equation is y = mx + b

where m is the slope and b is the point on the y axis when x=0 which is called the y intercept.

The slope is the rise over run.

Rise is the difference in the y values.

Run is the difference in the x values.

Rise = difference between -6 and -10  which is 4 units

Run = difference between 0 and -2 which is 2 units.

The slope would then be 4 over 2 or 4/2 which can be reduced down to 2.

If you visualize the line on the graph, the line slopes upward from left to right.  So the slope must be a positive number.

Slope = 2

The y intercept is when x=0.  One of the coordinates (0, -6) gives you that answer.  When x=0, y = - 6.  This is b.

Your equation would be y = 2x - 6

7 0
3 years ago
Read 2 more answers
What is the value of y?<br><br> 3√3<br><br> 6√3<br><br> 9√3<br><br> 12√3
marshall27 [118]

6 \sqrt{3}
7 0
3 years ago
kevin wants to make a mixture that is 50% lemon juice and 50% lime juice how much 100% lesson juice should he add to a juice mix
fiasKO [112]

Answer:

Kevin must add 1.2 gallons of 100% lemon juice to make a mixture of 50% lemon and 50% lime.

Step-by-step explanation:

Given : Kevin wants to make a mixture that is 50% lemon juice and 50% lime juice. 100% lesson juice should he add to a juice mixture that is 40% lemon juice and 60% lime juice to make 6 gallons of the 50% lemon 50% lime juice mixture.

To find : How much 100% lesson juice should he add to a juice mixture.

Solution :

According to question, we wants to make mixture where lemon = lime

We have to make 6 gallons, where

40% lemon juice require to make 6 gallon

i.e,  40\% \text{ of } 6= 0.4 \times 60=2.4

and 60% lime juice require to make 6 gallon

i.e,  60\% \text{ of } 6= 0.6 \times 60=3.6

Now, to make them equal subtract both of them

\Rightarrow 3.6-2.4=1.2

Therefore, he must add 1.2 gallons of 100% lemon juice to make a mixture of 50% lemon and 50% lime.

8 0
3 years ago
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Solve the system of equations. 2.5y + 3x = 27 5x – 2.5y = 5 What equation is the result of adding the two equations? What is the
Nitella [24]

Answer:

The solution to this system is (4, 1/6).

Step-by-step explanation:

Please separate these two equations for clarity.  I like to write them in column format:

2.5y + 3x = 27

5x – 2.5y = 5

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

8x           = 32, and x = 4.

Subbing 4 for x in the second equation yields 5(4) - 2.5y = 5.

Then 20 - 2.5y = 5, or 15 = 2.5y.  Solving for y, we get y = 1/6.

The solution to this system is thus (4, 1/6).

5 0
3 years ago
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