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bogdanovich [222]
3 years ago
7

What percent is students walk home from school

Mathematics
1 answer:
AveGali [126]3 years ago
5 0

Answer:

50percent

Step-by-step explanation:

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Mrs. Laura is between 50 and 80. If you divide her age by 9, the remainder is 1. If you divide by 4, the remainder is 1. How old
Mila [183]

Answer:

73 y/o

Step-by-step explanation:

Multiples of 9   between 50 and 80:

54    63     72     now add 1

55    64     73     now divide by 4 to find which has remainder of 1

73 y/o

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1 year ago
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What number is represented by point B?
enot [183]
It’s either a or b i’m not sure
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3 years ago
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Solve the equation to get the value y
tia_tia [17]

Answer:

y=11

x=-4

Step-by-step explanation:

y =-x+7

2x-5y=-7

insert the first equation into the second like so...

2x+5x-35=-7

Now rearrange...

2x+5x=-7+35

Now solve...

7x=-28

x=-4

Now incert x in any equation...

y=4+7

y=11

5 0
2 years ago
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Please help. Don’t understand this math problem!
oksian1 [2.3K]

Answer:

  { 4 }

Step-by-step explanation:

First you need to solve the equation. Then you need to write the solutions as a set.

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I like to use a graphing calculator to solve equations involving roots. That helps avoid extraneous solutions. Here, the graph of the left side intersects the graph of the right side at x=4. There is exactly one solution, so the solution set is ...

  { 4 }

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Solving this algebraically, you would isolate the radical, then "undo" it by squaring both sides of the equation. Then solve the resulting quadratic. That will have 2 solutions, only one of which will work in the original equation.

  √(5x +16) -2 = 3x -8 . . . . given

  √(5x +16) = 3x -6 . . . . . .  add 2

  5x +16 = (3x -6)^2 . . . . .  square both sides

  5x +16 = 9x^2 -36x +36 . . . . expand the square

  9x^2 -41x +20 = 0 . . . . . . subtract (5x+16) to put into standard form

Factors of 9·20 = 180 that have a sum of 41 are 5 and 36, so we can rewrite this equation as ...

  9x^2 -36x -5x +20 = 0

  9x(x -4) -5(x -4) = 0 . . . . . . factor by pairs

  (9x -5)(x -4) = 0

The values of x that make this equation true are the values that make the factors be zero: 5/9 and 4. Trying these in the equation, we find ...

  √(5(5/9) +16) -2 = 13/3 -2 = 2 1/3 . . . . value of the left side for x = 5/9

  3(5/9) -8 = -6 1/3 . . . . . . value of the right side for x=5/9; not the same

  x = 5/9 is NOT A SOLUTION

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  √(5(4)+16) -2 = √36 -2 = 4 . . . . value of the left side for x = 4

  3(4) -8 = 12 -8 = 4 . . . . . . value of the right side for x=4. These are the same, so ...

  x = 4 is a solution

The set of solutions is then ...

  { 4 } . . . . . solution set

5 0
3 years ago
2 percent of the students at Hamilton Middle School have red hair. There are 400 students at Hamilton Middle School. How many st
klio [65]

Answer: There are 8 students at Hamilton Middle School with red hair.

Step-by-step explanation:

Given: The proportion of the students at Hamilton Middle School have red hair = 2% = 0.02

Total students in  Hamilton Middle School = 400

Then , the number of students have red hair = (proportion of the students have red hair ) x (Total students )

= (0.02) x (400)

= 8

Hence, there are 8 students at Hamilton Middle School with red hair.

7 0
3 years ago
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