3 years ago

Help please. no trolls.

Mathematics

1 answer:

natta225 [31]3 years ago

3 0

B is the answer my dad is a mathematician he confirmed

You might be interested in

Please help me with this brainly

padilas [110]

it's C because the floor area is 120 square feet and the walls are 8 feet so if you multiply 120 × 8 you get 960.

8 0

3 years ago

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

A 12 foot ladder is placed 5 feet from the base of the building. About how high does the ladder reach?

Mariulka [41]

Answer:

7 foot

Step-by-step explanation:

8 0

3 years ago

Which fraction shoes unit rate that is equal to the ratio 18:2

kati45 [8]

Answer: 9/1

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

The perimeter of a rectangle is 50 feet and its area is 154 feet. What are the dimensions of the

sasho [114]

14 and 11 are it dimensions

Hope this helps!

3 0

3 years ago