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Inga [223]
3 years ago
8

3 (3b+2)=-30 What the answer

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
8 0
3 (3b+2)= -30
9b+ 6=-30
9b=-36
b=4
KiRa [710]3 years ago
6 0
3(3b + 2)=-30
(3) (3b) + (3) (2)=-30
9b + 6=-30
9b + 6 -6=-30 - 6
9b=-36
-36 divided by 9 equals -4.
The answer is b=-4
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(2.5×10−8)(9×10−10)<br><br> Express your answer in scientific notation.
Lunna [17]
Answer: 2.25x 10^{-17}

Scientific notation is used in science because the number can be vary from so much that using decimal is making it hard. The number expressed in 10^{x} form. Both number in the question is already in scientific notation. Then to multiply the number and keep it at scienfitic notation the calculation should be:

2.5 x 10^{-8}x 9 x 10^{-10}= 22.5 x 10^{-18}= 2.25x 10^{-17}

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3 years ago
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A party rental company has chairs and tables for rent. The total cost to rent
Paha777 [63]

Let c= cost to rent each other

Let t= cost to rent each other

2c+3t=25

6T+5T=49

Multiply the 2nd equation by (-2) and add equation together  

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-12c-10t= 98

2t=98

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Put this value into the 1st equation solve c

2c+3(49)=49

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Cost to each chair and table are same 49.


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3 years ago
What is the slope of the line represented by the following equation?
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Answer:

The slope of the line represented by the following equation is -4

y-intercept: −1

6 0
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What is the congruence method you will use to show that the triangles are congruent?
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The answer would be SSS or Side-Side-Side.
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6) What is 13% of 33.39?
icang [17]

Answer:

1. We assume, that the number 33.39 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 33.39 is 100%, so we can write it down as 33.39=100%.

4. We know, that x is 13% of the output value, so we can write it down as x=13%.

5. Now we have two simple equations:

1) 33.39=100%

2) x=13%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

33.39/x=100%/13%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 13% of 33.39

33.39/x=100/13

(33.39/x)*x=(100/13)*x       - we multiply both sides of the equation by x

33.39=7.6923076923077*x       - we divide both sides of the equation by (7.6923076923077) to get x

33.39/7.6923076923077=x

4.3407=x

x=4.3407

now we have:

13% of 33.39=4.3407

Step-by-step explanation:

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4 years ago
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