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Romashka-Z-Leto [24]
3 years ago
12

Julie bought $8.64 worth of 57-cent stamps and 30-cent stamps. The number of 30-cent stamps was 6 less than the number of 57-cen

t stamps. Solve the equation 0.57 s + 0.3 ( s − 6 ) = 8.64 for s , to find the number of 57-cent stamps that Julie bought.
Mathematics
1 answer:
Yuri [45]3 years ago
3 0

Answer:

The number of 57-cent stamps that Julie bought is 12

Step-by-step explanation:

Given equation

0.57 s + 0.3 ( s − 6 ) = 8.64

Open bracket

0.57s + 0.3s - 1.8 = 8.64

Collect like terms

0.87s = 8.64 + 1.8

0.87s = 10.44

Divide both sides by 0.87

s = 12

The number of 57-cent stamps that Julie bought is 12

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Maru [420]

(y x .12) x .3 = the total cost


6 0
3 years ago
Need help with two questions please
balandron [24]

Answer:

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range of f(x) is -inf to +inf

Step-by-step explanation:

the cubic power doesnt affect the sign

3 0
3 years ago
Given the statement -12 ≤ -15, which of the following is correct? It is a false statement, because -12 is not equal to -15. It i
laiz [17]

The given statement is a false statement because -12 is not equal to -15 and also -15 is less than -12 which are correct answers would be Options (A) and (D).

<h3>What is inequality?</h3>

Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.

The given statement as:

⇒ -12 ≤ -15

Since -12 and -15 are not equal and -15 is smaller than -12, the preceding statement is incorrect.

So the following statements are correct:

It is a false statement because -12 is not equal to -15.

It is a false statement because -15 is less than -12.

Hence, the given statement is a false statement because -12 is not equal to -15 and also -15 is less than -12 which are correct answers would be Options (A) and (D).

Learn more about the inequality here :

brainly.com/question/20383699

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5 0
2 years ago
Marion bought 14 packages of plastic frog and lizard fishing lures. She bought frog lures in packages of 4 and lizard lures in p
tatuchka [14]

Answer:

Marion bought 6  frog lures and 8 lizard fishing lures.

Step-by-step explanation:

Let f represent frog lures and l represent lizard lures.


The total packages Marion bought is

f+l=14...eqn1


If she bought frog lures in packages of 4 and lizard lures in packages of 6 for a total of 72 lures, then

4f+6l=72...eqn2


We make f the subject in equation 1 and put it into equation 2 to get;

f=14-l...eqn3


We put equation 3 into equation 2 to get;

4(14-l)+6l=72


\Righttarrow 2(14-l)+3l=36


We expand the bracket to get;

28-2l+3l=36


-2l+3l=36-28


l=8


We put l=8 into equation 3 to get;

f=14-8


f=6

Therefore Marion bought 6  frog lures and 8 lizard fishing lures.


6 0
3 years ago
Mack wants to calculate the circumference of a circle with a radius of 7 centimeters.
Fofino [41]

So C= dxpi or rx2xpi= c in this case 7x 2 = 14 is diameter do E D and A finds the diameter and the rest do not

7 0
4 years ago
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