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spayn [35]
2 years ago
7

Solve: 3x+y=15 y=-3x+8

Mathematics
1 answer:
klemol [59]2 years ago
3 0

Answer:

No Solution.

Given Equations:

  • 3x + y = 15 ....[Equation 1]
  • y = -3x + 8 ....[Equation 2]

Substitute Equation 2 into 1

  • 3x + (-3x + 8) = 15
  • 3x - 3x + 8 = 15
  • 8 = 15

No solution, as L.H.S ≠ R.H.S

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During the Christmas season, a store offers a sale. You buy one item for the regular price then you get 60% discount on a second
Lelu [443]

Answer:

24%

Step-by-step explanation:

Given: Regular price of two item is $30 and $20.

           60% discount provided on second item.

Now, lets find out discount provided on second item.

∴Discount provided = \frac{60}{100} \times 20 = \$ 12

Amount paid for second item = Regular price - discount provided

∴Amount paid on second item= 20 - 12= $8

Total amount paid for two item= Regular price of first item + discounted price of second item.

∴Total amount paid for two item= 30+8= \$ 38

Next, lets find out the percent of reduced total cost of two item.

\frac{reduced\ amount}{total\ regular\ price} \times 100

\frac{12}{50} \times 100 = 24\%

∴ By 24\% the total cost of two item reduce during sale.

8 0
4 years ago
Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in th
KATRIN_1 [288]

Answer:

I'm 99% sure the answer is A

Step-by-step explanation:

8 0
3 years ago
When the equation a – bx = cx + d is solved for x, the result is x = StartFraction a minus d Over b plus c EndFraction..
kiruha [24]

Answer:

x = -12/14 is the required solution for the given expression.

Step-by-step explanation:

Here, the given expression is:

5 – 6 x  = 8 x + 17

Now, here solving the expression for the value of x, we get:

5 – 6 x  = 8 x + 17

⇒ 5 -  17   = 8 x +  6 x

⇒- 12  = 14 x

or, x  = -12 / 14

Hence, x = -12/14 is the required solution for the given expression.

8 0
3 years ago
Read 2 more answers
What is the measure of the angle between the hour hand and the minute hand when it is 7:00 and 2:00
sergij07 [2.7K]

Answer:

150 degrees or 210 degrees

Step-by-step explanation:

A circle is equal to 360 degrees. The face of a clock is a circle and therefore 360 degrees. A clock is separated into 12 sections. Divide 360/ 12 = 30 degrees. This means each section is 30 degrees.

Between 2:00 and 7:00 clockwise, there are 5 sections. Since each section is 30 degrees, then 5*30 = 150 degrees.

Between 2:00 and 7:00 counter clockwise, there are 7 sections. Since each section is 30 degrees, then 7*30 = 210 degrees.

The angle depends on the direction of it.

3 0
3 years ago
How many wires are need to build a circuit A. one B.2 C.3 explain
anastassius [24]
The answer is B. Two wires are needed
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