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3 years ago

1)5x + 7 = -12step by step

Mathematics

1 answer:

tia_tia [17]3 years ago

4 0

Answer:

x=-1

Step-by-step explanation:

Let's solve your equation step-by-step.

5x−7=−12

Step 1: Add 7 to both sides.

5x−7+7=−12+7

5x=−5

Step 2: Divide both sides by 5.

5x/5=-5/5

x=−1

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Find the missing side lengths leave your answers as radicals in simplest form

schepotkina [342]

Answer:

Step-by-step explanation:

To find x, you will need to use sine. If you want to find y, use cosine:

sin 45 = x / 14 sqrt(2)

x = 14

(Since this is a 45 45 90 special triangle, x and y have the same length)

Since I talk about special triangles, 45 45 90 triangles are very simple:

To find the other two side lengths, just divide the hypotenuse by sqrt 2

14 sqrt(2) / sqrt(2) = 14

So both ways will still lead to 14

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3 years ago

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Ymorist [56]

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Step-by-step explanation:

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3 years ago

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The ferris wheel has a radius of 72 feet, with a clearance between the wheel and the ground of 12 feet. The rectangular coordina

Ne4ueva [31]

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4 0

4 years ago

PLEASE HELP!! this is due really soon

GuDViN [60]

Answer: There are 467 students at Holmes Junior High.

There are 342 students at Harper Junior High.

_________________________________________________

Step-by-step explanation:

_________________________________________________

Let " x" represent the number of students at Harper Jr. High.

Holmes Junior has: " (x + 125) " students .

Harper Junior High has: " x" students:

_________________________________________________

Together, the total number of students equal: " 809 " students.

so: " x + (x + 125) = 809 " .

We want to solve for "x" and " (x + 125)" .

We want to solve for "x" ;

then we can solve for " (x + 125) " by adding "125" ;

to our "solved value for "x" ;

____________________________________________

x + (x + 125) = 809 .

→ 1x + 1x + 125 = 809 ;

→ 2x + 125 = 809 ;

Now, subtract "125" from each side of the equation:

→ 2x + 125 - 125 = 809 - 125 ;

→ 2x = 684 ;

Now, divide each side of the equation by "2" ;

to isolate: "x" on one side of the equation; & to solve for "x" ;

→ 2x/ 2 = 684 / 2 ;

to get:

→ x = 342 ; which is the total number of students at Harper Jr. High.

Now, to solve for: " (x + 125)" ;

Plug in: "342" for "x" ;

→ " (342 + 125) " = " 467 " '

→ which is the total number of students at Holmes Jr. High.

_________________________________________________

Do our answers make sense:

Does: " 342 + 467 =? 809 ?? " ;

→ Yes!

_________________________________________________

Answer: There are 467 students at Holmes Junior High.

There are 342 students at Harper Junior High.

_________________________________________________

7 0

3 years ago

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Out of 230 racers who started the marathon 212 completed the race 14 gave up and 4 were disqualified. what percentage did not co

Tju [1.3M]

7.83% of the racers did not complete the race.

Step-by-step explanation:

Given,

Total racers who started = 230

Racers who completed = 212

Racers who gave up = 14

Disqualified racers = 4

Therefore, those who gave up and disqualified could not complete the race.

Racers who did not complete = 14+4 = 18

Percent of racers = $\frac{Racers\ who\ did\ not\ complete}{Total\ racers}*100$

Percent of racers = $\frac{18}{230}*100=\frac{1800}{230}$

Percent of racers = 7.826%

Rounding off to nearest whole number

Percent of racers = 7.83%

7.83% of the racers did not complete the race.

Keywords: percentage, addition

Learn more about addition at:

#LearnwithBrainly

8 0

4 years ago

1)5x + 7 = -12step by step​

1)5x + 7 = -12step by step