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musickatia [10]
3 years ago
9

100 POINTS IF YOU GET IT RIGHT

Mathematics
1 answer:
deff fn [24]3 years ago
5 0

The person above this should have the answer. It seems like nobody else is answering.

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What is the answer to 7 or 8???
Eddi Din [679]

Answer:

7. parallel:  k = 3

   perpendicular:  k = -4/3

8. $1300

Step-by-step explanation:

7.

Rewrite each equation as the slope-intercept form of a linear equation:

y = mx + b (where m is the slope and b is the y-intercept)

  8y = 12x + 6

⇒ y=\dfrac32x+\dfrac34

   4y = k(2x + 10)

⇒ 4y = 2kx + 10k

⇒ y = \dfrac12kx + \dfrac52k

If the graphs are parallel their slopes will be the same.

\implies \dfrac32=\dfrac12k

\implies k=3

If the graphs are perpendicular then the product of their slopes will be -1.

\implies \dfrac32 \times \dfrac12k=-1

\implies \dfrac12k=-\dfrac23

\implies k=-\dfrac43

8. Create a linear equation, where x is the number of coffee mugs and y is the total cost (in dollars).

Choose 2 ordered pairs from the table:  (10, 110) and (20, 195)

Let (x_1,y_1) = (10, 110)

Let (x_2,y_2) = (20, 195)

Use the slope formula to find the slope m:

\implies m=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{195-110}{20-10}=\dfrac{17}{2}

Now use the point-slope form of linear equation:

\implies y-y_1=m(x-x_1)

\implies y-110=\dfrac{17}{2}(x-10)

\implies y=\dfrac{17}{2}x+25

Substitute x = 150 into the equation and solve for y:

\implies y=\dfrac{17}{2}(150)+25=1300

Therefore, the total cost of ordereing 150 mugs is $1300

5 0
2 years ago
Resolva a equação a seguir:<br> (x-3/2) + (2x-3/4) = (x²) + (x)-(17/2)
bagirrra123 [75]
X =(-8+√464)/-8=1-1/2√<span> 29 </span><span>= -1.693</span>
8 0
3 years ago
write an equation for each line. line passes through (0,7) with m=3, line passes through (1,8) with m=3, line passes through (2,
melamori03 [73]
1. y = 3x + 7
2. y = 3x + 5
3. y = -2x + 8
8 0
3 years ago
The local supermarket is planning to fit a recycling centre in its car park.
Wewaii [24]
1,000cm by 400cm
Just multiply the two number by 200
I hope this is right! And I’m sorry if it’s wrong
7 0
3 years ago
Use the substitution method to solve the system of equations: y - 2x = 3; -X = y - 9. Write the answer as a point.
aleksley [76]

Answer:

Hello! I just took the test not too long ago the answer is -3

Have a good day! please mark brainliest!

4 0
3 years ago
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