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3 years ago

Tell whether the lines for each pair of equations are parallel, perpendicular, or neither

Mathematics

1 answer:

stiks02 [169]3 years ago

4 0

Answer:

C) Neither

Step-by-step explanation:

y = -1/4x + 8

-2x + 8y = 4

To compare the slopes we need to convert the second equation to the same form as the first ( that is slope/intercept form).

-2x + 8y = 4

8y = 2x + 4

Divide through by 8:-

y = 1/4 x + 1/2

The slope of the first line is -1/4 and its 1/4 for the second line.

If the slopes were the same the lines would be parallel and if they were perpendicular their product would be = -1.

The product is 1/4 * -1/4 = -1/16

So they are neither parallel nor perpendicular.

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What best describes 15x+8

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It could be $15 meal for x people plus $8 tip

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4 years ago

Deshawn won 95 pieces of gum playing hoops at the county fair. At school he gave four to every student in his math class. Write

wlad13 [49]

Answer:

95 - 4x

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4 years ago

Dillon studied 3 6/7 hours for his English test. He studied 5 3/14 hours for his math test. How much longer did he study for his

yaroslaw [1]

Answer:

$1 \frac{5}{14}$ , $\frac{19}{14}$

Step-by-step explanation:

How much longer did he study for his math test?

$E=3\frac{6}{7}$

$M=5\frac{3}{14}$

$x=difference$

An equation for this would resemble this:

$M- E=x$

Now before we get into any equation solving let's get the denominators equal to each other. we can do this by multiplying the numerator and denominator by 2. $\frac{6(2)}{7(2)}=\frac{12}{14}$

Now we can solve the equation:

$5\frac{3}{14} - 3\frac{12}{14} =\frac{19}{14}$

$1 \frac{5}{14}$ , as a mixed number

plz mark me brainliest. :0

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3 years ago

BRAINLIST ANSWER!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Anika [276]

Question 1:
(a) Using sine rule
ground/Sin 49 = plank/Sin 90

But sine 90 = 1, ground = 3 ft
Then,
3/Sin 49 = plank
Length of the plank = 3/Sin 49 ≈ 4.0 ft (rounded to nearest tenth)

(b) Height where the plank touches the wall

wall = Sqrt (plank^2 - ground^2) = Sqrt (4.0^2 - 3.0^2) ≈ 2.6 ft (Rounded to nearest tenth)

Question 2:
(a) Angle x
ground = 24 ft
support wire = 30 ft

Applying sine rule
support wire/Sin 90 = ground/Sin (90-x) ----- but Sin 90 = 1
Then,
Support wire = ground/Sin (90-x)
Sin (90-x) = ground/support wire = 24/30 = 0.8
90-x = Sin^-1(0.8) = 53.13 => x = 90-53.13 = 36.9°

(b) Height where the wire touches the tree (tree)
tree = Sqrt (support wire^2 - ground^2) = Sqrt (30^2 - 24^2) = 18 ft

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3 years ago

In a survey, 9 out of 15 people named math as their favorite class. Express the rate as a decimal.

Dvinal [7]

It would be 1.66 because you divide 15 by 9

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3 years ago