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zimovet [89]
4 years ago
15

Luis and Roberto are donating some of their baseball cards to the library. Luis started with 50 cards and gave away X number of

them. Roberto started with 80 cards and gave away 3 times as many as Luis had given away. If they both now have the same number of baseball cards, how many baseball cards did Roberto give away?
A - 15
B - 35
C - 45
D - 65
Mathematics
2 answers:
LUCKY_DIMON [66]4 years ago
5 0

Answer:

50-x = 80-3x

50 = 80-2x

-30 = -2x

x = 15

3x = 45

The answer is C

pav-90 [236]4 years ago
4 0

Answer:

the answer is c -45

explanation

calculator and a brain

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Are the fractions 3/9, 3/10, 3/11, and 3/12 in order from least to greatest
Cerrena [4.2K]

Answer:

The fractions \frac{3}{9},\frac{3}{10},\frac{3}{11},\frac{3}{12} are not in order from least to greatest.

Step-by-step explanation:

Given order of fractions from least to greatest:

\frac{3}{9},\frac{3}{10},\frac{3}{11},\frac{3}{12}

To check if the fractions are in correct order.

Solution:

The fractions given have same numerators but different denominators.

For fractions the higher the denominator the lower is the value of that fraction.

Thus, in the given list the least value fraction will be the fraction with the greatest denominator which is \frac{3}{12} and the greatest value fraction will be the fraction with the least denominator which is \frac{3}{9}

So, the order of the fractions from least to greatest is not correct. Instead the order is from greatest to least.

The correct order from least to greatest should be:

\frac{3}{12},\frac{3}{11},\frac{3}{10},\frac{3}{9}.

4 0
4 years ago
Each gallon of porch and deck paint covers 200 square feet. how many gallons are needed to cover 1241 square feet?
VikaD [51]

7 gallons are needed to cover 1241 square feet.

In this question,

Each gallon of porch and deck paint covers 200 square feet.

To find out how many gallons of paint needs, we have to divide the total area of deck by the amount of deck that one gallon covers.

We use the unitary method to find out how many gallons of paint needs.

Using unitary method,

1241 / 200 = 6.205

However, we cannot buy a fraction of a gallon of paint.

So, the amount of gallons of paint needed is approximately equal to 7 gallons.

Therefore, 7 gallons are needed to cover 1241 square feet.

Learn more about the unitary method here:

brainly.com/question/22056199

#SPJ4

3 0
1 year ago
What is the opposite of 6.2​
alexandr1967 [171]

Answer:

Are you looking for -6.2?

Step-by-step explanation:

If not let me know!

8 0
3 years ago
What is the inverse of the function f(x) = 4x + 8
Y_Kistochka [10]

Answer:

let f(x)= y

y = 4x+8

x= 4y + 8

4y = x - 8

y = (x - 8)/4

Hope this helps.

7 0
3 years ago
Read 2 more answers
What is 5s-9<2s+12
IRINA_888 [86]

5s-9 < 2s+12\ \ \ \ \ |\text{add 9 to both sides}\\\\5s < 2s+21\ \ \ \ |\text{subtract 2s from both sides}\\\\3s < 21\ \ \ \ |\text{divide both sides by 3}\\\\\boxed{x < 7\to s\in(-\infty,\ 7)}

5 0
3 years ago
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