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4 years ago

Judi solved the equation 1 – 18 = 43. Her work is shown. What error did Judi make?

Mathematics

2 answers:

sergeinik [125]4 years ago

8 0

Answer:

She should have added 18 to 43 rather than subtracted it.

Step-by-step explanation:

When you are going backwards such as in that problem, you have to do the opposite sign. For example, if it is adding a number, let's say 6, to another number, let's say 4x. So our equation can be 4x + 6 = 18 so I can explain all of the signs.

4x + 6 = 18

- 6 - 6

-----------------

4x = 12

4 times x = 12

/ 4 / 4

x = 3.

I hope this helps for future problems.

mihalych1998 [28]4 years ago

7 0

Answer:

she needed to add instead of subtract to find x so x should be 61

Step-by-step explanation:

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What are two differnt ways to write 119,000,003

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3 years ago

Read 2 more answers

As the moon revolves around the earth, the side that faces the earth is usually just partially illuminated by the sun. The phase

lys-0071 [83]

Answer:

a) 0∘ and 360∘

b) 300∘ and 60∘

c) 90∘ and 270∘

d) 180∘

Step-by-step explanation:

θ(0<=θ<=360∘)

then

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Putting F= 0

we get

0 = 1/2 (1−cosθ)

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cosθ = 1

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b) If F = 0.25

then putting values

1/4 = 1/2 (1−cosθ)

(1−cosθ) = 1/2

cosθ = 1/2

θ = $cos^-^1$ (1/2)

= 300∘ and 60∘

c) If F = 0.5

then putting values we get

1/2 = 1/2 (1−cosθ)

(1−cosθ) = 1

cosθ = 0

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= 90∘ and 270∘

d) If F = 1

then putting values we get

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4 years ago

Which of the following shows the correct order?

satela [25.4K]

Answer:

The last one, (1/2)^2 < 2/3 < 0.75

Step-by-step explanation:

So lets try to put each number in the same form, and see what their values are.

Lets start with (1/2)^2

This is squaring the 1 and 2 in 1/2. 1^2 is 1. 2^2 is 4. So its now:

1/4

Lets look at the others:

2/3

Lets just give it a common denominator. To do this, lets find the lowest number that both 3(from 2/3) and 4(from 1/4) go into. This is also known as the LCM.

This will be 12.

Since 3(from 2/3) goes into 12 4 times, we multipy both numerator and denominator of 2/3 by 4:

4*2=8, 3*4=12:

8/12

Since 4(from 1/4) goes into 12 3 times, we multiply both the numerator and denominator by 3:

1*3=3, 4*3=12:

3/12

So lets just go over what we know so far:

(1/2)^2 = 3/12

2/3 = 8/12

Now lets find our last value:

0.75

When converted into fraction form, we will get:

3/4

We already have a LCM, which is 12, that goes into this.

The denominator goes into 12 3 times, so again, we multiply numerator and denominator in this:

3*3=9, 4*3=12:

9/12

So:

(1/2)^2 = 3/12, 2/3 = 8/12, and 0.75 = 9/12

3/12 is smaller than 8/12, and 8/12 is smaller than 9/12. This can be written as:

3/12 < 8/12 < 9/12

And this basically means that:

(1/2)^2 < 2/3 < 0.75

This is the last answer in your answer list.

Hope this helps!

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