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Ksju [112]
1 year ago
10

Derek bought 6.00 worth of 21 cent stamps and 41 cent stamps.

Mathematics
1 answer:
sattari [20]1 year ago
6 0

we have the expression

0.21s+0.41(s-2)=6.00

Solve for s

that means ----> isolate the variable s

0.21s+0.41s-0.82=6.00

Combine like terms

\begin{gathered} 0.62s=6.00+0.82 \\ 0.62s=6.82 \end{gathered}

Divide by 0.62 both sides

\begin{gathered} s=\frac{6.82}{0.62} \\ s=11 \end{gathered}

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A = ?<br> b = ?<br> Please explain as well :)
sweet [91]

Answer:

a = 25 , b = 14

Step-by-step explanation:

For A

a/5 + 3 = 8

a/5 = 8 - 3

a/5 = 5

Cross multiply

a = 5 * 5

a = 25

For B

3b/7 - 1 = 5

3b/7 = 5 + 1

3b/7 = 6

Cross multiply

3b = 42

b = 42 / 3

b = 14

Hope it will help

5 0
3 years ago
Type the correct answer in the box. Spell the word correctly.
Wittaler [7]

Answer:

Scarce demand / inflation

The word "scarce" means low on supplies or anything else.

Inflation is the term used when a price increases in the market.

These two terms together would best describe the higher demand.

Hope this helps, have a great day! ♥

7 0
2 years ago
There are 271 songs on Amy's computer. She
shutvik [7]

Answer:

30

Step-by-step explanation:

You do 271 ÷9

= 30.11111111

The answer is your whole number (30)

4 0
2 years ago
Help plz!! Will give brainliest
r-ruslan [8.4K]

Answer:

C is the sorrect because those both lines are equal

Step-by-step explanation:

6 0
3 years ago
The population of bacteria in a Petri Dish is growing at a rate of 0.8t^3 + 3.5 thousand per hour. Find the total increase in ba
aliina [53]

Answer:

p=9900\\ bacterias in the initial two hours

Step-by-step explanation:

the growing rate is given by the ecuation

p(t)=0.8(t)^{3} +3.5 thousand per hour

for t=2 we have

p(2)=0.8(2)^{3} +3.5 = 9.9 thousand

p=9900\\ bacterias

In two hours we have 9900 bacterias

3 0
3 years ago
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