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Artemon [7]
3 years ago
10

Natalie has $13.80 to buy some pencils .each pencil cost 85 cents . how many pencils can she buy. plz help me

Mathematics
1 answer:
Delvig [45]3 years ago
6 0

13.80÷0.85=16.2352941176

She  can  buy  16  pencils:)

Please mark brainlyest

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gladu [14]
21/7=3
3x12=36yards 

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The difference of Ellen’s age and her sister Mary’s age is 4 years. Ellen is 5 years less than twice Mary’s age.
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I believe the answer is 9 years old or 8 years old.

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Please Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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2 years ago
One number is larger than another by 9. If the greater number is increased by 10, and the lesser number is tripled, the sum of t
kkurt [141]

Answer:

The larger number is -6, the smaller number is -15

Step-by-step explanation:

We have two numbers, a and b.

We know that one number is larger than another by 9.

Then we can write:

a = b + 9

then a is larger than b by 9 units.

If the greater number is increased by 10 (a + 10) and the lesser number is tripled (3*b), the sum of the two would be -41:

(a + 10) + 3*b = -41

So we got two equations:

a = b + 9

(a + 10) + 3*b = -41

This is a system of equations.

One way to solve this is first isolate one variable in one of the two equations:

But we can see that the variable "a" is already isolated in the first equation, so we have:

a = b + 9

now we can replace that in the other equation:

(a + 10) + 3*b = -41

(b + 9) + 10 + 3*b = -41

now we can solve this for b.

9 + b + 10 + 3b = -41

(9 + 10) + (3b + b) = -41

19 + 4b = -41

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7 0
2 years ago
100 points!! Brainliest if correct!!
ladessa [460]

Answer:

4π(w+1)(w-1)

Step-by-step explanation:

The total surface area of the cylinder

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= 2π[w^2-2w+1 + w^2+2w-3]

= 2π(2w^2-2)

= 4π(w^2 - 1)

= 4π(w+1)(w-1)

3 0
3 years ago
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