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2 years ago

What is an equation of the line that passes through the point (-3,-1) and is perpendicular to the line x-2y=6

Mathematics

1 answer:

Anarel [89]2 years ago

8 0

Answer:

y=-2x-7

Step-by-step explanation:

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A car company sells a scale model to of the size of one of its cars.

mixer [17]

Answer:

$w = 13500$ --- real windscreen

$v = 408$ --- scale volume

Step-by-step explanation:

Given

$k = \frac{1}{10}$ --- scale factor

See attachment

Required

Complete the table

To get the windscreen (w) of the real car, we do the following computation

$w = \frac{w_{scale}}{k^2}$

This gives:

$w = \frac{135}{(1/10)^2}$

$w = \frac{135}{1/100}$

$w = 13500$

Next, the volume (v) of the scale mode

We make use of the following computation

$v = v_{real} * k^3$

So, we have:

$v = 408000 * (1/10)^3$

$v = 408000 * 1/1000$

$v = 408$

7 0

2 years ago

A lightbulb has a normally distributed light output with mean 5000 end foot-candles and standard deviation of 50 end foot-candle

Blizzard [7]

To find the specification limit such that only 0.5% of the bulbs will not exceed this limit we proceed as follows;
From the z-table, a z-score of -2.57 cuts off 0.005 in the left tail; given the formula for z-score
(x-μ)/σ
we shall have:
(x-5000)/50=-2.57
solving for x we get:
x-5000=-128.5
x=-128.5+5000
x=4871.50

8 0

2 years ago

Isa and Jack have part-time jobs.

enot [183]

By process of elimination and plugging in the math we can say that Jack earns 8.25 an hour by multiplying 2*8.25=16.50. Isa must then earn 9.50, therefore she earns a greater hourly pay then Jack as a result

3 0

2 years ago

The pizza has an area of 78.5 in². What is the minimum width of a placemat that can be placed underneath it so that the pizza do

xz_007 [3.2K]

Answer:

The minimum width of the placemat is 10 inches.

Step-by-step explanation:

Let suppose that placemat has a square form, whose width must be at least equal to the diameter of the pizza, so that pizza does not touch the table. Hence, the following relationship is obtained:

$w = D$