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3 years ago

The perimeter of a certain scalene triangle is 100 inches. The side lengths

Mathematics

1 answer:

maria [59]3 years ago

4 0

Answer:

Step-by-step explanation:

Perimeter =100

the lengths of the sides are 5x+3x+30x+2x+10

5x+3x+30+2x+10=100

10x=100-40

10x=60

x=6

one side is 5x=30

one side 18+30=48

one side 2x+10=12+10=22

the longest side is 48

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if there are 200 questions and 4 marks for correct answers and -1 for incorrect answer and total marks is 250then what is the nu

Zanzabum

The number of questions answered correctly = 90.

<h3>What is a system of linear equations?</h3>

A system of linear equations is a set of two or more linear equations.
Linear equations refer to the equations that involve two or more variables in the form of "ax + b".

Now,

Given:

Total number of questions = 200
Marks for correct answer = 4
Marks for incorrect answer = -1
Total marks = 250

To find : Number of correct answers = ?

Finding:

Now, assuming that the student attempted and answered all the questions,

Let the number of questions correctly answered be x and incorrectly answered be y.

Then,

x + y = 200 (For number of questions) (eqn 1)
and 4x - y = 250 (For the marks scored) (eqn 2)

Solving the system of linear equations:

For eqn 2, we get that y = 4x - 250

Substituting in eqn 1, we get:

=> x + 4x - 250 = 200

=> 5x = 250 + 200 = 450

=> x = 90

That is, the number of questions answered correctly = 90, the incorrect answers = 200 - 90 = 110.

To learn more about system of linear equations, refer to the link: brainly.com/question/2226590

#SPJ4

8 0

1 year ago

If AABC is reflected across the yaxis, what are the coordinates of A?

Airida [17]

Answer:

A lies on (1,3) a reflection across the y-axis is (x,y) to (-x,y). The x turns the opposite and y stays the same so...

(-1,3)

5 0

3 years ago

PLS HELP ASAP THIS IS DUE IN 10 MINUTES I ONLY NEED HELP WITH 14

Ne4ueva [31]

Answer:

X+4

Step-by-step explanation:

Length is 4 more than width.

X+4= length

First box is 8

Second box is 13

Third box is 20

4 0

3 years ago

Read 2 more answers

Help ASAP with 10&11 ASAP thanksss

kari74 [83]

10 is 287.9999 m squared and 11 is 2,435.125 yards squared

6 0

4 years ago

5.Find the slope of a line perpendicular to

Lemur [1.5K]

Hi there!

When the slopes of two perpendicular lines are multiplied the outcome will be -1.

The slope is the number that is positioned in front of the variable x in the formula. In this case the slope of the given line is -2/5.

Let's call the slope of the perpendicular line m and take into account the given data of the question and my earlier explanation. We then find the following:

$- \frac{2}{5} \times m = - 1$
Divide both sides by - 2/5.

$m = \frac{ - 1}{ - \frac{2}{5} } = 2 \frac{1}{2} = \frac{5}{2}$
The answer is B.

~ Hope this helps you!

5 0

3 years ago