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Juli2301 [7.4K]
3 years ago
5

I’m sorry, I don’t really understand algebra. Please help me out if these

Mathematics
1 answer:
meriva3 years ago
5 0

Answer:

Bottom One

Step-by-step explanation:

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2) Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95. How m
d1i1m1o1n [39]

Answer:

13 pencils.

Step-by-step explanation:

Let x be the pens and y be the pencils

Given:

Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.

Total pens and pencils is 22

So, x+y=22----------------(1)

And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.

0.75x+0.40y=11.95------------(2)

solve equation 1 and equation 2 for x and y.

From equation 1.

x+y=22

y=22-x----------------(3)

put y value in equation 2.

0.75x+0.4(22-x)=11.95

0.75x+0.4\times 22-0.4x=11.95

0.75x+8.8-0.4x=11.95

0.75x-0.4x=11.95-8.8

0.35x=3.15

x=\frac{3.15}{0.35}

x=9

Now substitute x value in equation 3.

y=22-9

y=13

So, he buy 13 pencils.

5 0
3 years ago
What do you call to the set of ordered pairs
satela [25.4K]

Answer:

A relation is a set of ordered pairs. The set of all first components of the ordered pairs is called the domain of the relation and the set of all second components of the ordered pairs is called the range of the relation.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Find the value of c.....
Makovka662 [10]

Answer:

Step-by-step explanation:

the sum of the angles in a triangle is 180

33+2c+c-18=180

3c=180+18-33

3c=165

c=165/3

c=55

7 0
2 years ago
Simplify the expression 4 squaere root of 9
nlexa [21]

Answer:

12

Step-by-step explanation:

4 / sqrt {9}

4(3)

4 x 3

12

7 0
1 year ago
I have no idea how to or how I would even start to write a problem like this, Please help.
TEA [102]
That's an easy one! The year would be Monday Janurary 27th, 3000 and it would be the year of the monkey!
8 0
3 years ago
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