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Luba_88 [7]
3 years ago
8

Martin solved an equation, as shown below: Step 1: 19v = 76 Step 2: v = 76 - 19 Step 3: v =57 Part A: Is Martin's answer correct

or incorrect? If it is incorrect, explain why it is incorrect and show the correct steps to solve the equation. (6 points) Part B: How many solutions will this equation have? (4 points)
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
4 0

Answer:

A. incorrect. He has to divide 76 by 19, instead of subtract 19 to 76.

B. This equation has one solution. v=4

Step-by-step explanation:

Hi, Martin’s answer is incorrect.

A. He has to divide 76 by 19, instead of subtract 19 to 76.

The correct steps are:

19v = 76  

Since 19 is multiplying the variable, to eliminate it we have to divide by 19.

v = 76/19

v = 4

B. This equation has one solution. It’s v=4

Feel free to ask for more if needed or if you did not understand something.

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5x + 6y = 18 and 18x -15y =36
stira [4]
5x+6y=18

5x=18-6y

x=(18-6y)/5

Use that in the other equation
18(18-6y)/5 - 15y = 36

64.8-21.6y - 15y = 36

28.8=36.6y
.7868=y

Now put that number in for y on the first equation

5x+6(.78) = 18
5x + 4.68 = 18
5x = 13.32
x = 2.66
and y = .78


4 0
4 years ago
Read 2 more answers
What are the consecutive numbers that follow the number 686
Mekhanik [1.2K]

Answer:

  687, 688, 689, 690, ...

Step-by-step explanation:

Each in a list of consecutive integers is 1 more than the previous number. Consecutive integers following 686 are ...

  687, 688, 689, 690, ...

3 0
3 years ago
Employees at The Shoe Shack get a 25% discount when they buy a pair of shoes at the store.
yaroslaw [1]

Answer: Theo bought a pair of shoe for 36$

Step-by-step explanation:

25% = 0.25

48.00 * 0.25 = 12.00

   48.00 - 12.00 = 36.00

8 0
3 years ago
Given the Venn Diagram what is the probability that a person is an only child OR only has sisters?
Svetradugi [14.3K]

Based on the venn diagram of siblings, the probability of being an only child or having only sisters is d. 0.50.

<h3>What is probability of being an only child or having a sister?</h3>

The probability of being an only child or having a sister can be found as:

= (Number of those only sister + Number of only children) / Total number of people in poll

Solving gives:

= (8 + 7) / (8 + 10 + 5 + 7)

= 15 / 30

= 0.50

In conclusion, the probability of having a brother and sister is 0.50.

Find out more on Venn diagrams at brainly.com/question/9085273

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7 0
2 years ago
4x-3y=2<br> 3x=5y=16<br> solve using substitution method
vodomira [7]

\left\{\begin{array}{ccc}4x-3y=2&|\text{add 3y to both sides}\\3x+5y=16\end{array}\right\\\left\{\begin{array}{ccc}4x=3y+2&|\text{divide both sides by 4}\\3x+5y=16\end{array}\right\\\left\{\begin{array}{ccc}x=0.75y+0.5&(*)\\3x+5y=16\end{array}\right\\\\\text{substitute}\ (*)\ \text{to the second equation}\\\\3(0.75y+0.5)+5y=16\qquad\text{use distributive property}\\\\(3)(0.75x)+(3)(0.5)+5y=16\\\\2.25y+1.5+5y=16\qquad\text{subtract 1.5 from both sides}\\\\7.25y=14.5\qquad\text{divide both sides by 7.25}

\boxed{y=2}\\\\\text{substitute the value of y to}\ (*):\\\\x=0.75(2)+0.5\\\\x=1.5+0.5\\\\\boxed{x=2}\\\\Answer:\ x=2\ and\ y=2\to(2,\ 2)

7 0
3 years ago
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