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3 years ago

15

On her English test, Michelle answered 40 questions correctly, answered 5 questions incorrectly, and left 5 questions unanswered

. What percentage of the test questions did Michelle answer incorrectly?

2 answers:

vesna_86 [32]3 years ago

8 0

Answer:80%

Step-by-step explanation:yes

djverab [1.8K]3 years ago

6 0

Answer:

10%

Step-by-step explanation:

40+5+5=50

50-5=45

45*2=90

50*2=100

100-90=10

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Simplify 3x + 6x^2 - 5x - x^2

just olya [345]

Answer: -2x + 5x^2

Step-by-step explanation:

3x + 6x^2 - 5x - x^2 = x(3-5) + x^2(6-1) = -2x + 5x^2

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3 years ago

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What two numbers multiply and get 100 and add and get -29??

butalik [34]

X, y - the numbers

The numbers multiply to 100.
$xy=100$

The numbers add up to -29.
$x+y=-29 \\
y=-x-29$

Substitute -x-29 for y in the first equation:
$x(-x-29)=100 \\
-x^2-29x=100 \\
-x^2-29x-100=0 \\
-x^2-4x-25x-100=0 \\
-x(x+4)-25(x+4)=0 \\
(-x-25)(x+4)=0 \\
-x-25=0 \ \lor \ x+4=0 \\
x=-25 \ \lor \ x=-4 \\ \\
y=-x-29 \\
y=-(-25)-29 \ \lor \ y=-(-4)-29 \\
y=25-29 \ \lor \ y=4-29 \\
y=-4 \ \lor \ y=-25 \\ \\
(x,y)=(-25,-4) \hbox{ or } (x,y)=(-4,-25)$

The numbers are -4 and -25.

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3 years ago

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Solve each of these equations. Explain or show your reasoning. 2(3x+2)=2x+28 5y+13=-43−3y 4(2a+2)=8(2−3a)

dalvyx [7]

Answer:

x = 6

y = 7

a = 1/4

Step-by-step explanation:

Equation 1:

2(3x+2) = 2x + 28

6x + 4 = 2x + 28

4x = 24

x = 6

Equation 2:

5y+13 = -43-3y

8y = -56

y = -7

Equation 3:

8a + 8 = 16 - 24a

32a = 8

a = 1/4

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Jlenok [28]

Answer:

Two angles are called supplementary when their measures add up to 180 degrees.

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frez [133]

A.The perimeter of a rectangle and its worth because its the only one that would be proportional Hope this helped

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