1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ruslelena [56]
2 years ago
15

Solve this for Brainliest!See the attachment [Level - GCSE]

Mathematics
2 answers:
dem82 [27]2 years ago
5 0

Answer:

x=3+4\sqrt{3}

Step-by-step explanation:

I agree with the another person's steps.

madreJ [45]2 years ago
3 0

Answer:

x = 3 + 4\sqrt{3}

Step-by-step explanation:

OPQ is a right angle triangle.

<u>Using Pythagoras</u>

x^{2} + (x+5)^{2} = (x+8)^{2}\\x^{2} + x^{2} + 10x +25 = x^{2} + 16x + 64\\x^{2} + x^{2} - x^{2} + 10x - 16x + 25 - 64 = 0\\x^{2} - 6x -39 = 0

<u>Using quadratic formula</u>

<u />x = \frac{-b \± \sqrt{b^{2}-4ac}}{2a}\\x = \frac{-(-6) \± \sqrt{(-6)^{2}-4(1)(-39)}}{2(1)}\\x = \frac{6}{2} \± \frac{\sqrt{192}}{2}\\x = 3 \± \frac{8\sqrt{3}}{2}\\x = 3 \± 4\sqrt{3}

x = 3 + 4\sqrt{3} = 9.928(4s.f.)

             OR

x = 3 - 4\sqrt{3} = -3.928(4s.f.) (Length can't be negative)

∴ x = 3 + 4\sqrt{3}

You might be interested in
A) An empty bulldozer weighed 5 8 ⁄10 tons. If it scooped up 7 1 ⁄10 tons of dirt, what would be the combined weight of the bull
irakobra [83]

Answer: 12 9/10 and 10 7/8

Step-by-step explanation:

5 8/10 plus 7 1/10 equals 12 9/10

8 5/8 plus 2 2/8 equals 10 7/8

6 0
3 years ago
WHATS THE correct ANSWER MARKING BRAINLIEST
galben [10]

Answer:

D

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Determine the margin of error for a 99​% confidence interval to estimate the population proportion with a sample proportion equa
Harman [31]

Answer:dudjdjdjdjdjdjdjdjdjdjdjdjdjdjdiidjdjdjdjd

Step-by-step explanation:

6 0
3 years ago
From a group of 12 students, we want to select a random sample of 4 students to serve on a university committee. How many combin
borishaifa [10]

Answer:

495 combinations of 4 students can be selected.

Step-by-step explanation:

The order of the students in the sample is not important. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many combination of random samples of 4 students can be selected?

4 from a set of 12. So

C_{n,x} = \frac{12!}{4!(8)!} = 495

495 combinations of 4 students can be selected.

8 0
3 years ago
Help as soon as possible real answers only please
ankoles [38]

Answer:

I believe the answer is B.Good luck!

3 0
2 years ago
Other questions:
  • How do I solve this?
    9·2 answers
  • Can you plz help me...
    7·2 answers
  • 2. 2m + 7 &gt;63<br> H|||||||||<br> What’s the answer
    11·2 answers
  • One month Ahmad rented
    9·1 answer
  • Find dy/dx by implicit differentiation for ysin(y) = xcos(x)
    9·1 answer
  • Pls pls pls pls help me i nerd help asap i will give BRAINLIEST!!!!!!
    10·2 answers
  • A rectangle's length is 7 less than 3 times it's width. If the perimeter of the rectangle is 170 inches, what is the width, leng
    12·1 answer
  • Simplify the following<br>(x-y)²​
    9·1 answer
  • Please answer these 2 questions for me!!
    8·1 answer
  • Evaluate 3x^2 – 2xy - 4y^2
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!