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bekas [8.4K]
2 years ago
14

HELP PLS ILL GIVE BRAINLIEST

Mathematics
1 answer:
Vilka [71]2 years ago
8 0

Answer:

2•5s+s

10s+s

11s

the first one

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Brianna has x nickels and y pennies. She has no less than 20 coins worth no more
Bond [772]

Answer:

y \ge 20 - x

y \le 80 -5x

(x,y) = (15,5)

Step-by-step explanation:

Given

Nickels = x

Pennies = y

Amount = \$0.80 maximum

Coins = 20 minimum

Required

Solve graphically

First, we need to determine the inequalities of the system.

For number of coins, we have:

x\ +\ y\ge 20 because the number of coins is not less than 20

For the worth of coins, we have:

0.05x\ +\ 0.01y\ \le0.80 because the worth of coins is not more than 0.80

So, we have the following equations:

x\ +\ y\ge 20

0.05x\ +\ 0.01y\ \le0.80

Make y the subject in both cases:

y \ge 20 - x

0.01y \le 0.80 - 0.05x

Divide through by 0.01

\frac{0.01y}{0.01} \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}

y \le \frac{0.80}{0.01} -\frac{ 0.05x}{0.01}

y \le 80 -5x

The resulting inequalities are:

y \ge 20 - x

y \le 80 -5x

The two inequalities are plotted on the graph as shown in the attachment.

y \ge 20 - x --- Blue

y \ge 80 -5x --- Green

Point A on the attachment are possible solutions

At A:

(x,y) = (15,5)

4 0
3 years ago
Find a so that the point (-1,5) is on the graph of f(x)=ax2+1
sasho [114]

Step-by-step explanation:

to solve for a,

f(-1) = 5

a(-1)^2 + 1 = 5

a + 1 = 5, so a=4

7 0
3 years ago
A triangle has an area of 10 square feet. The height is 5 feet. What is the length of the base (in feet)?
Nady [450]

Answer:

4 ft

Step-by-step explanation:

A=\frac{1}{2} bh

A=10 h=5

10=\frac{1}{2} b(5)\\

20=5b (multiply both sides by 2)

4=b (divide by 5)

7 0
3 years ago
In 1910, the population of Seattle, Washington, was 237,194. In 2010, the population had grown to 608,660. By about how much did
Wewaii [24]
You subtrscy the bigger number (2010's population) by the smaller one (1910's population). 237194-608660= 371,466.

When you round to the 100's you check the 10's place. If 5 or higher add a 1 to the hundreds place, and make the 1's and 10's place 0. If lower don't add anything and make the 1's and 10's place into 0s.

When you round it, you will get 371,400
7 0
3 years ago
If an electrician charges $60 an hour and a base fee Of 150 for every house call. Write an equation foR C, in terms of t, res pr
azamat

Answer

Basically you need to know how many hours to work then I think it would help your problem.

Step-by-step explanation:

5 0
3 years ago
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