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IRINA_888 [86]
3 years ago
9

an airplane is 180 feet long. blake makes a scale model of the airplane 1:45 of its actual size. how long is the airplane

Mathematics
1 answer:
LenaWriter [7]3 years ago
7 0

Answer: 4 feet

Step-by-step explanation:

An airplane is 180 feet long.

Blake makes a scale model of the airplane which is 1:45 of its actual size. To find the length of the airplane model goes thus:

= 1/45 × 180

= 4 feet

The model is 4 feet

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The sales tax in your city is 8.8%, point, 8, percent, and an item costs $63$, before tax.
PIT_PIT [208]

You would pay $5.54 on that item.

Step-by-step explanation:

Given,

Cost of item = $63

Sales tax rate = 8.8%

Amount of sales tax = 8.8% of cost of item

Amount of sales tax = \frac{8.8}{100}*63

Amount of sales tax = \frac{554.4}{100}

Amount of sales tax = $5.54

You would pay $5.54 on that item.

Keywords: percentage, division

Learn more about percentages at:

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4 years ago
Substitution method for 7x-2y=1 & x-2y=1
RUDIKE [14]
We want to use the Substitution method to solve
7x - 2y = 1          (1)
x - 2y = 1           (2)

From equation (1), obtain
2y = 7x - 1          (3)

Substitute (3) into (2).
x - (7x - 1) = 1
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From (3), obtain
2y = 7*0 - 1 = -1
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Answer: (0, -1/2)  or x=0, y= -1/2.

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                                          <em>Question No 7</em>

Answer:

Please check the explanation.

Step-by-step explanation:

Show that 4x - x² - 7 is always negative.

Given

4x - x² - 7

4x - x² - 7 is always negative because:

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Hence, 4x - x² - 7 is always negative

For example,

let suppose we enter x = 1

4(1)-1^{2} -7\\=4-1-7\\=4-8\\=-4

let suppose we enter x = -1

4(-1)-(-1)^{2} - 7\\= -4 - 1 - 7\\= -12

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Answer:

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Step-by-step explanation:

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Answer: $432

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