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3 years ago

Help with these please! Need to do them ASAP !!

Mathematics

2 answers:

Anarel [89]3 years ago

7 0

5. Debbie should've rounded the 2008 to 4,600 because 4,637 is less than 4,650. If it was over 4,650 it would've been rounded to 4,700. With the knowledge of the over 4,650 rule, we automatically know that in 2012 she was correct when she said 4,700.

saw5 [17]3 years ago

5 0

Debbie is correct because you can not a percentage of a person therefore you have to round it, and if there was 5,000 female athletes in 2008 and 4,700. If you take 5,000 and subtract 4,700; the answer is 300.

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.. Find the L.C.M. of (a - 5)(a – 4) and (a + 4)(a – 5)

andrew-mc [135]

A-5 A-5 AND A-4 A-5

A-10 AND A-1

Hope it helps you

3 0

3 years ago

Read 2 more answers

I need help with these three problems please

Liono4ka [1.6K]

Answer:

Q7. 11.3 inches (3 s.f.)

Q8. 96.2 ft

Q9. 36.4cm

Step-by-step explanation:

Q7. Please see attached picture for full solution.

Q8. Let the length of a side of the square be x ft.

Applying Pythagoras' Theorem,

$34^{2} = {x}^{2} + {x}^{2} \\ 2 {x}^{2} = 1156 \\ {x}^{2} = 1156 \div 2 \\ {x}^{2} = 578 \\ x = \sqrt{578} \\$

Thus, the perimeter of the square is

$= 4( \sqrt{578} ) \\ = 96.2 ft\: \: \: (3 \: s.f.)$

Q9. Equilateral triangles have 3 equal sides and each interior angle is 60°.

Since the perimeter of the equilateral triangle is 126cm,

length of each side= 126÷3 = 42 cm

The green line drawn in picture 3 is the altitude of the triangle.

Let the altitude of the triangle be x cm.

sin 60°= $\frac{x}{42}$

$\frac{ \sqrt{3} }{2} = \frac{x}{42} \\ x = \frac{ \sqrt{3} }{2} \times 42 \\ x = 21 \sqrt{3} \\ x = 36.4$

(to 3 s.f.)

Therefore, the length of the altitude of the triangle is 36.4cm.

4 0

3 years ago

Read 2 more answers

Help me people please n thank you

arsen [322]

Answer:

the second one g(x){f(x)=x^(2)-2x-2

Step-by-step explanation:

hope this is right

4 0

3 years ago

-2.8f+0.4f-11-4=? <br><br><br><br> HELP

Alexxandr [17]

<h2>Answer: −2.4f − 15</h2><h2>_____________________________________</h2><h3>Honey, just simplify the expression to get your answer.</h3><h3>−2.4f − 15</h3><h2>_____________________________________</h2>

Hope you have a good day, Loves!~ <3

6 0

2 years ago

You plan to build a house that is 1 ½ times as long as it is wide. You want the land around the house to be 20 feet wider than t

IgorLugansk [536]

The total area with land based on the information given is 3x² + 60x.

Let the width = x

Let the length = (1.5 × x) = 1.5x

Area = 1.5x × x = 1.5x²

The area along with land:

Width = x + 20

Length = 3 × x = 3x

The total area with land:

= Length × Width

= 3x(x + 20)

= 3x² + 60x.

Learn more about length on:

brainly.com/question/2217700

#SPJ1

7 0

1 year ago