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Elis [28]
3 years ago
5

Which properties justify the steps taken to solve the system?

Mathematics
1 answer:
uranmaximum [27]3 years ago
8 0

Answer:

Step-by-step explanation:

The given equations are:

2a+7b=0 and 3a-5b=31

Statement                                                                    Reason

1. 10a+35b=0, 21a-35b=217    (Multiply first equation by 5 and second by 7)

2. 31a=217                                (Adding both the equations)

3. a=7                                       (Dividing both sides by 31)

4. 2(7)+7b=0                            (Substituting a=7 in first equation)

5.14+7b=0                                (solving step 4)

6. 7b=-14                                  (Subtracting 14 on both sides)

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user100 [1]
<span><span><span>133.333333333 the 3 goes on forever</span></span><span><span><span>
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7 0
4 years ago
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Factor completely: 3x3 – 48x
Natasha_Volkova [10]
Factor 3x3−48x:

Since their aren't like terms, then

3x3−48x

<em>=3x(x+4)(x−4)</em>
 
Ur answer is D)
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3 years ago
3D In the cryptarithm shown, different letters stand for different digits, and no leading digit can equal 0. Find the greatest p
svp [43]

Answer:

1961

Step-by-step explanation:

The greatest value of OFF can be achieved by making the hundreds places the greatest, followed by the tens, and then the ones.

S=9

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7 0
3 years ago
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The surface area of a given cone is 1,885.7143 square inches. What is the slang height?
nasty-shy [4]

This question is not complete. This is because it lacks the appropriate diagram containing necessary information to solve this question.

Please find attached the appropriate diagram to solve for this question

Complete Question :

The surface area of a given cone is 1,885.7143 square inches. What is the slant height?

Answer:

25 inches

Step-by-step explanation:

In the diagram, we are given the following information

Height of the cone = 20 inches

Radius of the cone = 15 inches.

The formula for the slant height of a cone represented by l =

l² = r² + h²

l = √(r² + h²)

l = √(15² + 20²)

l = √(225 + 400)

l = √625

l = 25 inches

Therefore, the slant height of this cone = 25 inches

3 0
3 years ago
What is the missing constant term in the perfect square that starts with x^2+6x ?
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x                3
x                3

(x+3) (x+3)

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x^2 + 6x + 9 (true)

your answer is 9 as the constant

hope this helps
8 0
4 years ago
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