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Nikitich [7]
3 years ago
14

Darwin's best time for running 5000 metres is 16 minutes. He wants to run it in 15 minutes and 30 seconds.

Mathematics
2 answers:
Rudik [331]3 years ago
6 0

Answer:

3 percent

Step-by-step explanation:

convert to seconds

960 seconds to 930 seconds

30 seconds ÷ 960=3 per cent

marshall27 [118]3 years ago
4 0

Answer:

-3.125%

Step-by-step explanation:

Percentage  change = new-original/original  x 100

15.5-16= -0.5

-0.5/ 16 x100 = -3.125%

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What is the measure of angle 6, to the nearest degree?<br> 81°<br> 90<br> 99°<br> 105°
Kaylis [27]

Answer: 99

Step-by-step explanation:

10x-9=9x

-9=-x

x=9

angle 7 = 9*(9)=81

angle 6 = 180-81= 99

NOTE: DO NOT hit 90 because I did that and got it wrong. Just a heads up. Get luck!

6 0
2 years ago
A student says that the solution of 375=x-28 is 347. Explain the student's error and find the correct answer.
Genrish500 [490]

Hi there!

Answer:

<u><em>x=403 and 403=x</em></u>

Step-by-step explanation:

Because a student says the answer is 347 is not the right answer. The final answer should be x=403 and 403=x.

375=x-28

Switch sides.

x-28=375

add by 28 both sides of an equation.

x-28+28=375+28

simplify.

x=403 and 403=x

403-28=375

28+375=403

Hope this helps!

-Charlie

7 0
2 years ago
Read 2 more answers
What must be added to a^2+3/5a​
kolezko [41]
This question doesn’t really make sense- is it multiple choice, if so what are the options? A can be anything as long as it’s the same?
3 0
2 years ago
The question is in the photo. it is asking for 2 answers
Alex777 [14]

9514 1404 393

Answer:

  • 2nd force: 99.91 lb
  • resultant: 213.97 lb

Step-by-step explanation:

In the parallelogram shown, angle B is the supplement of angle DAB:

  ∠B = 180° -77°37' = 102°23'

Angle ACB is the difference of angles 77°37' and 27°8', so is 50°29'.

Now, we know the angles and one side of triangle ABC. We can use the law of sines to solve for the other two sides.

  BC/sin(A) = AB/sin(C)

  AD = BC = AB·sin(A)/sin(C) = (169 lb)sin(27°8')/sin(50°29') ≈ 99.91 lb

 AC = AB·sin(B)/sin(C) = (169 lb)sin(102°23')/sin(50°29') ≈ 213.97 lb

7 0
2 years ago
Someone please help me answer this!!!
sashaice [31]

Answer:

4.8 km is the answer.

Step-by-step explanation:

a = ?

b = 5 km

c = 7 km

According to the Pythagorean theorem,

a² + b² = c²

a² + 5² = 7²

a² + 25 = 49

a² = 49 - 25

a² = 24

a = 4.8989

Round to the nearest tenth,

a = 4.8 km

7 0
2 years ago
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