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3 years ago

Alana took a math quiz last week. She got 12 out of 20 problems correct. What percentage did Alana get correct?

Mathematics

1 answer:

Deffense [45]3 years ago

4 0

Answer:

60%

Step-by-step explanation:

The fraction 12/20 in simplest form would be 6/10 which come be converted to a percentage. (6x10)/(10x10)=60/100 or 60%.

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Please help ASAP 12 points

Roman55 [17]

Answer:

they are opposites

Step-by-step explanation:

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4 years ago

1/2 (4x−5) +5/2=10 what is the value of X?

weqwewe [10]

Answer:

x=5

Step-by-step explanation:

5 0

4 years ago

zhenek [66]

Answer:

Just substitute the values in!
(-5/9) + (-4/3) - 2/3 = - 5/9 - 12/9 - 6/9 = -23/9.

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2 years ago

Solve the following proportion n/6=15/3

Natalka [10]

We can simplify 15/3 to 5.

N/6 = 5. Then multiply both sides of the equation by 6, giving us N = 30.

5 0

3 years ago

one interior angle of a polygon is equal to 800 and each of the other interior angles are 128 degrees. Find the number of sides

KiRa [710]

Answer:

Step-by-step explanation:

Given information:

Interior angle of a polygon cannot be more that 180°.

One interior angle = $80^{\circ}$

Other interior angles are = $128^{\circ}$

Let n be the number of sides of the polygon.

Sum of interior angles is

$Sum=80+128(n-1)$

$Sum=80+128n-128$

Combine like terms.

$Sum=128n-48$ .... (1)

If a polygon have n sides then the sum of interior angles is

$Sum=(n-2)180$

$Sum=180n-360$ .... (2)

Equating (1) and (2) we get

$180n-360=128n-48$

Isolate variable terms.

$180n-128n=360-48$

$52n=312$

Divide both sides by 52.

$n=\frac{312}{52}$

$n=6$

Therefore the number of sides of the polygon is 6.

8 0

3 years ago