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3 years ago

I need help on number 23 and explain please for brainiest answer !!

Mathematics

2 answers:

aalyn [17]3 years ago

7 0

Answer

Step-by-step explanation:

the square root of 72 is 8.5 wich is in between 8 and 9

Leviafan [203]3 years ago

3 0

Answer:

Step-by-step explanation:

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solve this word problem leading to quadratic equation: the area of a rectangle is 60cm². The length is 11cm more than the width.

morpeh [17]

Answer:

Step-by-step explanation:

let : x The length and y the width you have this system :

xy =60....(1)

x = y+10...(2)

put the value for x in (1): (y+10)y =60

the quadratic equation is : y² +10y - 60 = 0

Δ =b² - 4ac a = 1 b= 10 c= - 60

Δ =10² - 4(1)(-60) = 324 =18²

y 1 = (-10-18)/2 negatif...... refused

y 2 = (-10+18)/2 =4

the width is 4

8 0

3 years ago

8 ÷ 3/5 Equals? I need this quickly.

cricket20 [7]

Answer:

= 40/3 = 13 1/3

Step-by-step explanation:

8/1 ÷ 3/5 = 8/1 x 5/3

8 x 5 = 40

1 x 3 = 3

= 40/3 = 13 1/3

6 0

3 years ago

Please help please please help<br> i have tried everything i could think of but i cant figure it out

Vera_Pavlovna [14]

Answer:

$\frac{\sqrt[4]{10xy^3}}{2y}$

Step-by-step explanation:

I am assuming you want me to rationalize the denominator.

6 0

2 years ago

What is the area of a circle that has a diameter of 18"?

lubasha [3.4K]

Since the formula for the area of a circle is Pi x r squared, the area would be 81 x Pi (you teacher may want you to use Pi as 3.14 or put it in your calculator).

7 0

3 years ago

Read 2 more answers

What is the volume of a cone with a height of 9.5 inches and a radius of 8 inches? Cone V = 1 3 Bh 1. Rewrite the formula for th

Nesterboy [21]

Answer:

636.4 in³

Step-by-step explanation:

Volume of a cone is given by:

$V = \frac{1}{3}\pi r^2 h$

where r is the radius of the base of the cone and h is its height.

It is given that, the radius of the base of the cone is, r = 8 in

The height of the cone is, h = 9.5

$\Rightarrow V = \frac{1}{3} \times 3.14 \times (8)^2 (9.5) = 636.4 in^3$

Thus, the volume of the cone is 636.4 in³

6 0

3 years ago

Read 2 more answers