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3 years ago

Write an equation for this problem

Mathematics

2 answers:

kenny6666 [7]3 years ago

8 0

2 hours. She spent 1 hour for math which was half so the total would be 2*1=2.
1/2x=1 /x2
x=2

bazaltina [42]3 years ago

3 0

.5x=1 should be the eqution
x=<u><em></em></u>.5/1
x=2 :)

Hope I helped!

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Setler79 [48]

For this case we have the following expression:

$(\frac{2x}{3} - 7) + 7$

What we must do in this case is to use one of the properties of the sum.

In this case, we must use the associative property.

The associative property states:

$(a + b) + c = a + (b + c)$

We have then:

$(\frac{2x}{3} - 7) + 7 = \frac{2x}{3} + (- 7 + 7)$

Simplifying we have:

$(\frac{2x}{3} - 7) + 7 = \frac{2x}{3} + (0)$

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Answer:

the following is equal to (2x / 3 - 7) + 7

D. 2x / 3.

7 0

3 years ago

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A surveying team set up some equipment 104104 ft from the base of a tree in order to sight the top of the tree. From ground leve

jarptica [38.1K]

Answer:

Relative error = 0.0254 %

Step-by-step explanation:

Given details

Height of equipment from base is 104 ft

Elevation angle is 27.5 degree

From figure we have

$tan\theta = \frac{x}{104}$ .........1

$tan(27.5) = \frac{x}{104}$

x = 54.13 ft

differentiating 1st eq wrt x

$\frac{d}{dx} tan\theta = \frac{d}{dx} [\frac{x}{104}]$

$sec^2\theta \frac{d\theta}{dx} = \frac{1}{104}$

Taken $d\theta \ as \Delta x \ and\ dx = \Delta x$ for minute change

$\Delta x = 1.5% x$

$= 0.015 \times 54.13 = 0.8119 ft$

from $sec^2 \theta \frac{d\theta}{dx} = \frac{1}{104}$

$\Delta \theta = \frac{1}{104 sec^2 \theta} \Delta x$

$\Delta \theta = \frac{1}{104 \times 1.115} 0.8119$

$\Delta \theta = 0.007$

Reltaive error $= \frac{\Delta \theta}{\theta} \times 100$

$= \frac{0.007}{27.5}\times 100$

Relative error = 0.0254 %

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4 years ago

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anastassius [24]

Answer:

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Step-by-step explanation:

y=12

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3 years ago

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Angelina_Jolie [31]

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wolverine [178]

X = shorts and y = socks

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------------------add
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so shorts (x) cost $12 and socks (y) cost $ 3 per pack

7 0

3 years ago