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4 years ago

Describe the error made in subtracting the two

Mathematics

1 answer:

oksian1 [2.3K]4 years ago

5 0

Answer:

You must subtract all terms of the numerator being subtracted out, not just the first term.

The negative 2 should have been subtracted out to get a numerator of x+1-x+2

The simplified numerator of the difference should be 3, not –1.

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A 14-foot tree casts an 18-foot shadow. Find the angle of elevation from the tip of the shadow to the top of the tree. Round the

serious [3.7K]

The tangent of the angle would be given by 14/18, so the angle would be:
tan⁻¹(14/18)
= 37.9 to the nearest tenth of a degree

6 0

3 years ago

Martin had M dollars initially. First, Martin spent 1/3 of his money. Then Martin spent 3/4 of what was left. Finally, Martin sp

Ilya [14]

Answer:

first he had M some unknown amount

then he had 2/3 M since he spent 1/3 M

then he spent 3/4 of the (2/3 M) so he had 1/4 of the ( 2/3M)

then he spent what was left $20 so $20 = 1/4 ( 2/3 M) now solve for M

and check by doing each step and figuring how much was spent and how much left.

another method 

let us consider the left amount be Y and total now of M dollar be X

then

Y = amount of money Nartin has left

Y = X - ( 1/3 ) ( X ) - ( 3/4 ) ( X - 1/3 X ) - 20

Y = X - 1/3 X - 3/4 X + 3/12 X - 20

Y = X - 4/12 X - 9/12 X + 3/12 X - 20

Y = X - 10/12 X - 20

Y = X - 5/6 X - 20

Y = ( 1 / 6 ) ( X ) - 20

hope it helped u buddy : )

5 0

4 years ago

4 * 4 * 4 * 5 * 5 help please

yarga [219]

Answer:

=1600

Step-by-step explanation:

=4*4*4*5*5

=16*4*25

=64*25

=1600

Hope this helps, have a nice day/night! :D

4 0

3 years ago

You're trying to enlarge an image that is 4 centimeters tall and 10 centimeters wide onto a billboard that is 3 meters tall and

Norma-Jean [14]

The height scale is 75

Step-by-step explanation:

The height scale is the ratio between the height of the final image and the height of the original image.

In this problem, we have:

$y = 4 cm$ (height of the original image)

Converted into meters,

$y=0.04 m$

$y'=3 m$ (height of the enlarged image)

Therefore, the height scale is given by the following ratio:

$r=\frac{3 m}{0.04 m}=75$

So, the height scale is 75.

Learn more about scales:

brainly.com/question/570757

#LearnwithBrainly

4 0

4 years ago

How would you write 12 ^-3 using a positive exponent

morpeh [17]

Answer:

1/12³

Step-by-step explanation:

Negative power in the numerator becomes positive in the denominator

1/12³

5 0

3 years ago