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irina1246 [14]
2 years ago
12

Matt made a 75% on his test. There were 20 questions on the test. How many

Mathematics
2 answers:
MArishka [77]2 years ago
5 0

Answer:

15

Step-by-step explanation:

1/20=5%

2/20=10%

...

if the questions he got right equals x, and each question he got right equals 5%, than x/20=75% because he got 75% right.

now to solve it.

x/20=75%

percent means divided by 100 so

x/20=75/100

x/20*20=(75/100)*20

x=0.75*20

x=15

he got 15 questions correct

GaryK [48]2 years ago
3 0

Answer:

55

Step-by-step explanation:

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Solve (16×^3-3×^2+43×-5)÷(×^2-2)
Oksana_A [137]

Answer:

3872/(x^2 - 2)

Step-by-step explanation:

Simplify the following:

(16^3 - 3^2 - 5×43)/(x^2 - 2)

3^2 = 9:

(16^3 - 9 - 5×43)/(x^2 - 2)

16^3 = 16×16^2:

(16×16^2 - 9 - 5×43)/(x^2 - 2)

| 1 | 6

× | 1 | 6

| 9 | 6

1 | 6 | 0

2 | 5 | 6:

(16×256 - 9 - 5×43)/(x^2 - 2)

16×256 = 4096:

(4096 - 9 - 5×43)/(x^2 - 2)

43 (-5) = -215:

(4096 - 9 + -215)/(x^2 - 2)

4096 - 9 - 215 = 3872:

Answer: 3872/(x^2 - 2)

7 0
3 years ago
Theorem: A line parallel to one side of a triangle divides the other two proportionately.
Kisachek [45]

Answer:

Segment BF = 16

Step-by-step explanation:

The given theorem states that a line parallel to one side of a triangle divides the other two sides proportionately

The given theorem is the Triangle Proportionality Theorem

According to the theorem, given that segment DE is parallel to segment BC, we have;

\dfrac{AD}{BD} = \dfrac{AE}{EC}

Therefore;

BD = \dfrac{AD}{\left(\dfrac{AE}{EC} \right) }  = AD \times \dfrac{EC}{AE}

Which gives;

BD = 6 \times \dfrac{18}{12}= 9

Similarly, given that EF is parallel to AB, we get;

\dfrac{AE}{EC} = \dfrac{BF}{FC}

Therefore;

BF = FC \times \dfrac{AE}{EC}

Which gives;

BF = 24 \times \dfrac{12}{18} = 16

Therefore, the statement that can be proved using the given theorem is segment BF = 16.

8 0
3 years ago
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musickatia [10]

Answer:

7 hours

Step-by-step explanation:

715 / 13 = 55 miles per hour

385 / 55 = 7 hours

Best of Luck!

5 0
3 years ago
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ExtremeBDS [4]

Answer:

2/3

Step-by-step explanation:

2/3=.66666666......

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Answer:

Yes

Step-by-step explanation:

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