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Nikolay [14]
3 years ago
7

Please HELPPPP me !!!!!

Mathematics
1 answer:
dedylja [7]3 years ago
6 0

Answer:

y = 4x - 3\\Slope \ m_1 = 4

EQUATION OF LINE PERPENDICULAR

Lines \ are \  perpendicular => m_1 \cdot m_2 = -1\\

slope, m_2 = \frac{-1}{4}

equation \ of \ the\ line \ passing \ through \ (-2, 2) \ slope ,m_2 :\\(y - y_2) =m_2(x - x_2)\\ (y - 2) = \frac{-1}{4} (x -(-2))\\\\y - 2 = \frac{-1}{4} (x +2)\\\\y = \frac{-1}{4}x - \frac{1}{2}  + 2\\\\y = \frac{-1}{4}x + \frac{3}{2}

EQUATION OF LINE PARALLEL

Lines \ are \ parallel => m_1 \cdot m_3 = 1\\slope, m_3 = \frac{1}{4}Equation \ of \ the \ line \ through \ (-2, 2) \ and \ slope, m_3:\\(y - y_3) =m_3(x - x_3)\\\\(y-2) = \frac{1}{4} (x - (-2))\\\\y-2 = \frac{1}{4}(x+2)\\\\y = \frac{1}{4}x + \frac{1}{2} +2\\\\y = \frac{1}{4}x + \frac{5}{2}

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A teacher grades 27 tests in 3 hours Find the constant of variation
ANTONII [103]

Answer:

<h2>9</h2>

Step-by-step explanation:

Step one:

given

Let the number of tests graded be g = 27

time taken t = 3 hours

Required

The constant relating the time and the number of tests

Step two:

<em>"The constant of variation is the number that relates two variables that are directly proportional or inversely proportional to one another."</em>

so that the direct variation is

g∝kt

g=t/k

k= g/t

k=27/3

k=9

3 0
3 years ago
How long would you need to earn interest on $350 invested at 5.5% in order to earn $154 in interest
Fed [463]

Answer:

8 years.

Step-by-step explanation:

The simple interest formula is principal × rate (as a decimal) × time = interest. In this question, you want to find the time.

First, plug in your numbers. 350 × .055 × t = 154. Then, to find t, divide to get t one side.

t = 154 / 350 × .055

Then solve.

350 × .055 is 19.25. 154 / 19.25 is 8.

So, your answer is 8 years.

154/350*.055 = t

4 0
3 years ago
the scale on a map is 1 : 15000 how many kilometers on the ground would be represented by 12 cm on the map?
Sergeu [11.5K]

Answer:

1.8 km

Step-by-step explanation:

The scale on the map is 1 : 15000.

This means that every 1 cm on the map is equal to 15000 cm on the ground.

12 cm on the map will therefore be:

12 * 15000 = 180000 cm

Let us convert to kilometres:

100000 cm = 1 km

180000 cm = 180000 / 100000 = 1.8 km

12 cm on the map will be 1.8 km on the ground.

4 0
4 years ago
Miss Hutson bought a 14&amp;3 4th pound turkey at $1.84 per pound.what was the cost of the turkey
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We have been given that Miss Hutson bought a 14\frac{3}{4} pound turkey at $1.84 per pound. We are asked to find the cost of turkey.

To find the total cost of the turkey, we will multiply total pounds of turkey by cost of per pound of turkey.

\text{Cost of the turkey}=14\frac{3}{4}\times \$1.84

Let us convert 14\frac{3}{4} into decimal form.

14\frac{3}{4}=14.75

\text{Cost of the turkey}=14.75\times \$1.84

\text{Cost of the turkey}=\$27.14

Therefore, the cost of the turkey would be \$27.14.

3 0
3 years ago
A farmer in China discovers a mammal hide that contains 71% of its original of its original amount of C-14, Find the age of the
svetoff [14.1K]
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5 0
3 years ago
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