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2 years ago

15

a student answers 75% of the questions on a math exam correctly. if he answers 30 questions correctly. how many questions are on

the exam?

1 answer:

Komok [63]2 years ago

8 0

There is 40 questions on the exam

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SOMEONE PLEASE HELP ME

Ostrovityanka [42]

Answer:

28, 30, 32

Step-by-step explanation:

Three consecutive even numbers are three even numbers that are next to each other. For example, 2, 4 and 6 would be 3 consecutive even numbers.

With this sort of problem, you want to try to let each number be equal to one thing and then construct the same number of equations as you have variables:

Let's let,

Integer 1 = X

Integer 2 = Y

Integer 3 = Z

X + Y + Z = 90

We also know, that

Y = X + 2

And that

Z = X + 4

Now, we can sub these equations into the first equation. We do this so that we have everything represented as the same variable.

90 = X + (X+2) + (X+4)

90 = 3X + 6

84 = 3X

28 = X

So, the numbers are 28, 30 and 32

8 0

3 years ago

Find the missing segment in the image below

Talja [164]

The missing segment is 25

5 0

3 years ago

Read 2 more answers

A triangle can be formed with the lengths 10 cm, 5 cm and 14 cm.

Grace [21]

Answer: yes.

Step-by-step explanation: i dont really get this one so i just said yes

5 0

3 years ago

Rachel saved money to buy art supplies. She used 13 of her savings to buy brushes. She used 35 of her savings to buy paint. What

vekshin1

Given:

Rachel used $\dfrac{1}{3}$ of her savings to buy brushes.

She used $\dfrac{3}{5}$ of her savings to buy paint.

To find:

The fraction for remaining savings.

Solution:

Fraction that Rachel used of her savings to buy brushes and paint is

$\text{Fraction for used amount}=\dfrac{1}{3}+\dfrac{3}{5}$

$=\dfrac{5+9}{15}$

$=\dfrac{14}{15}$

Now,

$\text{Fraction for remaining savings}=1-\text{Fraction for used amount}$

$\text{Fraction for remaining savings}=1-\dfrac{14}{15}$

$\text{Fraction for remaining savings}=\dfrac{1}{15}$

Therefore, $\dfrac{1}{15}$ of her savings is remaining.

6 0

2 years ago

A section in a stained glass window is shaped like a trapezoid. The top base is 1 centimeter and the bottom base is 3.5 centimet

LUCKY_DIMON [66]

I don't know if it's right but this is what I did. the rounding might be a little different.

$(1 + 3.5) \div 2 \times x = 8.1$
$4.5 \div 2 = 2.3$
$2.3x = 8.1$
$8.1 \div 2.3 = 3.5$
x=3.5 cm.

5 0

3 years ago