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mixas84 [53]
3 years ago
5

Which system of equations below has exactly one solution? y = –8x – 6 and y = –8x + 6 y = –8x – 6 and One-halfy = –4x – 3 y = –8

x – 6 and y = 8x – 6 y = –8x – 6 and –y = 8x + 6
Mathematics
2 answers:
murzikaleks [220]3 years ago
7 0

Answer:

y=-8x-6 and

y=8x-6 has exactly one solution

Step-by-step explanation:

meriva3 years ago
6 0

Answer:

y = –8x – 6 and y = 8x – 6

Step-by-step explanation:

-8x - 6 = 8x - 6

16x = 0

x = 0

y = 8(0) - 6 = -6

The only solution is (0,-6)

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A retailer buys TV's fro $175 and marks them up 225%, what is the new cost
jonny [76]

Answer:

   $568.75

Step-by-step explanation:

To find the markup, we multiply the original price by the percentage of markup

Markup = 175 * 225%

             =175 * 2.25

              =393.75

The new price is the markup  plus the original price

New price = markup+ original price

                  =393.7+175

                   =568.75

3 0
3 years ago
Which ordered pair is a solution of the inequalty y<3x + 1?
alexandr1967 [171]

Step-by-step explanation:

Since (-3) < 3(1) + 1 is true, option C is correct.

5 0
3 years ago
Evaluate the following expression
Nana76 [90]
Your question answer is 16

5 0
3 years ago
A farmer would like to estimate the mean amount of
Soloha48 [4]

Answer:

0.765

Step-by-step explanation:

The dot plot shows the data

x= 20,21,22,23,24,24,25,25,25,26,26,27,28,29,31

The mean x`= ∑x/n =20+21,+22,+23,+24,+24,+25,+25,+25+,26+,26+,27+,28+,29+,31/15= 376/15

=25.067

where n is the sample size= 15

The standard deviation is σ=2.96

( using calculator)

The standard error is calculated as

SE= σ/√n

SE= 2.96/√15

SE= 0.765

8 0
3 years ago
Sarah needs to go to five different stores. How many ways can she go to two of them before lunch?
Zina [86]

Answer:

10

Step-by-step explanation:

Solution 1: At first, you might think that because there are 5 ways to choose the first store and 4 ways to choose the second store, the answer is 5 * 4 = 20 but this is over-counting by a factor of 2. Say that two of the stores are A and B. If she went to A then B, that's the same as going to B then A since you still go to the same stores, therefore, the answer is 20 / 2 = 10.

Solution 2: We need to find the number of ways to choose 2 stores from 5, we can do this by calculating ₅C₂ which equals:

5! / 2!  * 3!

= 5 * 4 * 3 * 2 * 1 / 2 * 1 * 3 * 2 * 1

= 5 * 4 / 2 * 1

= 10

6 0
3 years ago
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