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klasskru [66]
3 years ago
11

How do i solve 15=16x-11x

Mathematics
1 answer:
lyudmila [28]3 years ago
8 0
You need to isolate x, which means you need to get it alone. 16x and 11x are like terms because they both have an x, do subtract them. 16-11=5. So 15 = 5x

Then to turn 5x into x, divide by five. This is because 5/5 is 1, and 1x is x. Divide both sides, so

X = 3
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4 0
3 years ago
Hurry! Someone please help me I only have 5 minutes to do this quiz I don’t need you to show all your work just the answer becau
Doss [256]

Answer:

(x+x)(x+x+x)

Step-by-step explanation:

5 0
3 years ago
6. Romeo is planning to elope with Juliet tonight. He knows that her windowsill is 18 feet from the ground. He also knows the 4-
Ierofanga [76]

Answer:

24' ladder

Step-by-step explanation:

It is sometimes useful to illustrate situations given in problems, as in this case;

The wall will be a vertical with a height 18 ft and the ladder will be away from the wall at the bottom and against the wall at the top end;

This is shown in the picture and as can be seen, it is a right-angle triangle;

We are told there is 4-to-1 rule, with which we can find the distance of the ladder from the wall at the bottom, denoted as a in the picture;

The rule is essentially saying the ratio of the vertical height of the ladder to the horizontal distance is 4 : 1, or ⁴/₁ (or just 4)

We know the vertical height of the ladder needs to be 18 ft since the window is that high up the wall;

The ratio will be 18 : a, or ¹⁸/ₐ

We can set the fractions equal to each other and solve:

¹⁸/ₐ = ⁴/₁

¹⁸/ₐ = 4

18 = 4a

a = 18/4

a = 4.5

The distance from the wall at the bottom should be 4.5 ft according to the 4-to-1 rule

Now we have the 2 sides of our triangles we can use Pythagoras theorem to find the length of the ladder, denoted x;

x² = (18)² + (4.5)²

x² = 324 + 20.25

x² = 344.25

x = 18.5539753

The ladder must be at least 18.6' long to be able to lean against the wall, reaching the window and complying with the 4-to-1 rule;

The ladder size therefore will be the 24' ladder, since it has a maximum length of 21' which can reach the window;

The smaller option, the 20', could be used since the reach is 19' 10", which is sufficient to reach Juliet but it would not likely be suitable for climbing into the window since it is not long enough;

Since he may climb into the window according to the scenario, the answer should be the 24' ladder both if he does or does not climb into the window;

I'm quite clueless about what to do with the information in the last 2 columns, not even sure what they mean to be honest so I think they are irrelevant.

4 0
2 years ago
Please help me find this out. I’ve been stuck on this for awhile now. Thank you!
Kaylis [27]

Answer:

(2.25 ; 0.5)

Step-by-step explanation:

6 0
3 years ago
What is the value of (0.3)4 ?
Alex_Xolod [135]

It's multiplication. Simply multiply 0.3 by 4. How multiplying dedcimals works is that we forgett the decimal until later. So, first we have 3 times 4. What's that? 12. And how many numbers did we have after the decimal? One. So, we hop over one decimal space to receave the answer 1.2. I hope I helped!!!

4 0
3 years ago
Read 2 more answers
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