All categories

3 years ago

Sari has 3 times as many pencil erasers as Sam. Together, they have 28 erasers. How many erasers does Sari have?

Mathematics

2 answers:

BartSMP [9]3 years ago

8 0

Let

x--------> amount of erasers that Sari has

y--------> amount of erasers that Sam has

we know that

$x=3y$ -------> equation $1$

$x+y=28$ -----> equation $2$

Substitute equation $1$ in equation $2$

$[3y]+y=28\\ 4y=28\\ y=28/4\\ y=7$

find the value of x

$x=3y\\ x=3*7\\ x=21$

therefore

the answer is

Sari has $21$ erasers

Katyanochek1 [597]3 years ago

6 0

She has 25 erasers.
28
- 3
-----
25

You might be interested in

You have a part time job, you get paid

stira [4]

Answer:

26.3 hours

Step-by-step explanation:

We need to divide 250 by 9.50, therefore we get the answer ≈ 26.3

3 0

3 years ago

Read 2 more answers

A probability experiment is conducted in which the sample space of the experiment is S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}.

Snezhnost [94]

Answer:

The answer is " $\bold{\frac{2}{3}}$ "

Step-by-step explanation:

Given set:

$\to F \ or\ G = \{ 5,6,7,8,9,10,11,12\}$

In the above-given set, there are 8 elements and 12 possible outcomes so, the equation is:

$\to P( F\ or \ G) = \frac{8}{12}$

$= \frac{2}{3}$

by using the general addition Rule:

$\to P(F \cup G) = P(F) +P(G)- P(F \cap G)$

$=\frac{5}{12}+\frac{4}{12}- P(E \cap H)\\\\=\frac{6}{12}+\frac{3}{12}- \frac{1}{12}\\\\=\frac{6+3-1}{12}\\\\=\frac{8}{12}\\\\=\frac{2}{3}\\\\$

3 0

3 years ago

A company is evaluating a new reading program that is supposed to improve test scores. The box plots show the results of reading

Zepler [3.9K]

Answer:

I would go with C.

Step-by-step explanation:

Some of the students did better on the q1 and q3 area but overall the minimum and maxium are still the same amount so the effect didnt work. The highest grade on the pretest was the same on the post test and likewise with the lowest score so the answer would be C

8 0

3 years ago

Solve for z. 1+2z<5.

Ksju [112]

Answer:

z < 2

Step-by-step explanation:

1 + 2z < 5

2z < 4

z < 4 ÷ 2

z < 2

5 0