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Shkiper50 [21]
3 years ago
11

The sum of the following algebraic expression 2x + 15, 7-8x and 3x - 41 is 30 find the value of x..​

Mathematics
2 answers:
Ksju [112]3 years ago
3 0

\\  \tt  \longmapsto2x + 15 + 7 - 8x + 3x - 41 = 30 \\   \\  \tt  \longmapsto 2x - 8x + 3x + 15 + 7 - 41 = 30 \\  \\  \tt  \longmapsto  - 3x - 19 = 30 \\  \\  \tt  \longmapsto 3x + 19 =  - 30 \\  \\  \tt  \longmapsto 3x =  - 30 -19 \\  \\  \tt  \longmapsto 3x =  - 49 \\  \\  \tt  \longmapsto x = - \frac{49}{3}

andrey2020 [161]3 years ago
3 0

Answer:

Step-by-step explanation:

2x + 15 + 7 - 8x + 3x - 41 = 30

<u>2x  - 8x + 3x</u> +<u> 15 + 7 - 41</u> = 30

Combine like terms

-3x - 19 = 30

Add 19 to both sides

-3x = 30 + 19

-3x = 49

Divide both sides by (-3)

x = 49/-3

x = -16\frac{1}{3}

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The area of a sector of a circle is given by the equation , 3.142S/360 where r is the radius of the circle and S is the angle me
Diano4ka-milaya [45]
Given that the area of the sector is given by:
A=3.142r² S/360
where:
r is the radius 
S is the angle measure of the sector
If Mia solved the equation for S, the equations that she wrote would be found as follows;

From A=3.142r² S/360
making S the subject by first dividing both sides by 3.142r^2 we shall have:
A/3.142r²=S/360
next we multiply both sides by 360
360×A/3.142r²=S/360×360
this will give us
(360A)/(3.142r²)=S
therefore the equation that Mia will get is:
S=(360A)/(3.142r²)


4 0
3 years ago
Read 2 more answers
What is the benchmark fraction of 7/10 x 16
Tomtit [17]
Lets change "16" by its to 16/1 .. since nothing can't help support 16 by itself when it is going into 7/10

Now that we change that ... your problem becomes 7/10 × 16/1

7/10 × 16/1 = 11 1/5

Because
7(16) / 10(1) = 112/10
Now lets go. to how we solve the for the answer

112/10 = 11 1/5


☺


6 0
3 years ago
Describe the translation 7 units to the left, 12 units up using a vector.
Lelu [443]
The magnitude of the vector is √(7^2+12^2)=√(49+144)=√193

The direction is α=arctan(y/x)=arctan(12/-7)≈-59.74 however this is relative to the negative x-axis so we add 180° to get the standard angle...180-59.74=120.26°

So the vector is √193 @ 120.26°
5 0
3 years ago
Is this an example of inductive reasoning, deductive reasoning, or neither?
densk [106]

Since the specific conclusion is based on a general premise, this is a case of deductive reasoning.

<h3>What is deductive reasoning?</h3>

The term deductive reasoning has to do with the process of arriving at a specific conclusion based on a more general premise.

In this case, the conclusion arrived at was based on the fact that Mia saw a general sign that read that 3 grapefruit cost $2.50. Hence, this is a case of deductive reasoning.

Learn more about deductive reasoning:brainly.com/question/16685989

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2 years ago
Using the numbers 3, 2, and 4, which of these problems would have a solution of 4?
Alexeev081 [22]
Pemdas

ok if we look at the first one
exponents first
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we have
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das is answer


the first one is the answer
7 0
4 years ago
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