MATHEMATICS MIDDLE SCHOOL

The sum of two consecutive numbers is 157. This equation, where n is the first number, represents the situation:2n + 1 = 157.

What is the first number?

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

2n + 1 = 157

2n = 157 - 1

2n = 156

n = 156/2

n = 78
Answer 2
Answer:

Answer:

the answer is B.78

Step-by-step explanation:

2n + 1 = 157

2n = 157 - 1

2n = 156

n = 156/2

n = 78

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There were 70
runners to start a race. In the first half of the race,
1/5
of them dropped out. In the second half of the race,
4/7
of the remaining runners dropped out. How many runners finished the race?

Answers

Hey there! So,to do this, I would recommend making the fractions into decimals. 1/5 is equal to 0.2 so you multiply that times 70 runners . This equals 14 runners who dropped out. Subtract those who dropped out from the total and now you have 56 runners left. 4/7 as a decimal is about 0.575. Times that by 56 and you get another 32 who dropped out. You're now down to only 24 runners who finished the race.

Question 27 on this pictured math sheet please. Have a great day!

Answers

Answer:

a matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. For example, the dimension of the matrix below is 2 × 3, because there are two rows and three columns: Provided that they have the same size, two matrices can be added or subtracted element by element.

Jane made a poster that had a length of 1 2/3 feet and a width 5/6 of feet. What is the perimeter of her poster?

Answers

Answer:

5 feet

Step-by-step explanation:

1 4/6 + 1 4/6 + 5/6 + 5/6

2 + 18/6

5

Answer:

5 feet

Step-by-step explanation:

1 4/6 + 1 4/6 + 5/6 + 5/6

2 + 18/6

5

Step-by-step explanation:

Are the angles with the given measures complementary, supplementary, or neither? m∠R = 43° and m∠S = 57°



A.
complementary


B.
supplementary


C.
neither

Answers


the answer is neither because they just do look like they do but they don't because they are actually neither that's why it is so tricky.

How to solve 0.5(5-7x)=8-(4x+6)

Answers

\frac { 1 }{ 2 } \left( 5-7x \right) =8-\left( 4x+6 \right) \n \n \frac { 1 }{ 2 } \left( 5-7x \right) =8-4x-6

\n \n \frac { 1 }{ 2 } \left( 5-7x \right) =2-4x\n \n \frac { 1 }{ 2 } \left( 5-7x \right) =2\left( 1-2x \right) \n \n 2\cdot \frac { 1 }{ 2 } \left( 5-7x \right) =2\cdot 2\left( 1-2x \right)

\n \n 5-7x=4\left( 1-2x \right) \n \n 5-7x=4-8x\n \n -7x+8x=4-5\n \n x=-1

Hey! Just answering so the other guy can have brainiest! Hope this helped!

ms. reynolds, the math teacher, was disappointed to announce that only 22% of her 68 students passed an exam. How many students failed the test?

Answers

either a student passes an exam or fails it. that means the percentage of students who pass plus the percentage of students who fail must add to 100%. this also means that if 22% pass, then 78% fail. there are 68 students total and 78% fail so the number of students failing is:
(78/100)(68) = 53.04 which is approximately 53 students.

let me know if you have any questions!!!!
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