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schepotkina [342]
3 years ago
13

the area of a rectangle is 56 centimeters. The length is 2 centimeters more than x and the width is 5 Centimeters less than twic

e X. Solve for x. Round to the nearest whole number
Mathematics
1 answer:
Verdich [7]3 years ago
4 0
Okay, so...
length = x+2 
width = 2x-5

Multiply these
x+2(2x-5) 
x + 4x - 10
5x - 10 = 56
   

5x - 10 = 56
     + 10   + 10

5x = 66

x = 11.20

:D

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PLEASE HELP!!!!!! TIMED QUESTION!!!! FIRST CORRECT ANSWER WILL GET BRAINLIEST....PLEASE ANSWER NOW!!!!
Margarita [4]

Answer:

Option (3)

Step-by-step explanation:

From the picture attached,

Bar graph sketched shows the grades earned by the students in an exam.

Number of students who achieved the grade A = 17

Number of students who achieved grade B = 14

Number of students with grade C = 5

Number of students with grade D = 9

Total students who took the exam = 17 + 14 + 5 + 9 = 45

Option (1)

"\frac{1}{5} of the students earned a C"

Fraction of students who earned C = \frac{\text{Students who earned C}}{\text{Total students}}

                                                          = \frac{5}{45}

                                                          = \frac{1}{9}

Therefore, this option is incorrect.

Option (2)

"3% more students earned an A then B"

Percentage of students who earned A = \frac{\text{Students got A}}{\text{Total students who took the exam}}\times 100

                                                                = \frac{17}{45}\times 100

                                                                = 37.78%

Percentage of students who earned B = \frac{\text{Students got B}}{\text{Total students who took the exam}}\times 100

                                                                = \frac{14}{45}\times 100

                                                                = 31.11%

Difference in percentage = 37.78 - 31.11

                                          = 6.67%

Therefore, this option is not correct.

Option (3)

"20% of the students earned a D"

Percentage of students who earned D = \frac{\text{Students got D}}{\text{Total students who took the exam}}\times 100

                                                                 = \frac{9}{45}\times 100

                                                                 = 20%

Option (3) is the correct option.

Option (4)

" \frac{1}{4} of the class earned a B"

Fraction of class who earned B = \frac{\text{Students got B}}{\text{Total students who took the exam}}

                                                    = \frac{14}{45}

Therefore, Option (4) is not correct.                                        

6 0
3 years ago
A line includes the points (10, -10) and (1,8). What is its equation in slope-intercept form?
Anettt [7]

Answer:

y=-2x+10

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(8-(-10))/(1-10)

m=(8+10)/-9

m=18/-9

m=-2

------------------

y-y1=m(x-x1)

y-(-10)=-2(x-10)

y+10=-2x+20

y=-2x+20-10

y=-2x+10

4 0
3 years ago
PLEASE HELP I WILL MARK BRAINLIST!!
lina2011 [118]

Answer:

umm whats the question-

7 0
3 years ago
Read 2 more answers
Missing angles in triangles
notsponge [240]

Answer:

Step-by-step explanation: the way to find missing anlges are to use trigrometery

4 0
3 years ago
Read 2 more answers
What is the value of the expression 10(6 + 5)² when b = 3?
SashulF [63]

10(3+5)^2

10(8)^2

10(64)

=640

3 0
3 years ago
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