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4 years ago

ANSWER THE 2 QUESTION IN 1 MINUTE AND YOU WILL BE THE BRAINLIEST! QUICK QUICK PLEASE!

Mathematics

2 answers:

Svetlanka [38]4 years ago

5 0

Answer:

1. 54in

2. 5yrs

Step-by-step explanation:

18in - - - - 1yr

?? In ------3yrs

(cross multiplying)

18 × 3 = 54 inches

18in - - - - - 1yr

90in - - - - -??? Yrs

(Cross multiplying)

90/18 = 5yrs

Oksi-84 [34.3K]4 years ago

4 0

Answer:

1. 54

2. 5

Step-by-step explanation:

1. 18 x 3 = 54

2. 90/18 = 5

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Pls help me and explain why it’s that answers.

maw [93]

The answer is the third one

3 0

3 years ago

An observation deck extends 120 feet out above a valley. The deck sits 70 feet above the valley floor. If an object is dropped f

Rzqust [24]

Answer:

Step-by-step explanation:

The height formula given is:

h = -16t^2 + 70

That means the object will be initially (t=0) at the height 70 feet, from where it will be dropped.

If we want to know the time when the object will be at height 6 feet, we just need to use h=6 in the equation, and then calculate the value of t:

6 = -16t^2 + 70

16t^2 = 64

t^2 =4

t = 2 s

So, it will take 2 seconds for the object to be 6 feet above the valley floor.

8 0

3 years ago

Solve by completing the square x^2-6x-4=0

Vesna [10]

Answer:

x = 3 ± $\sqrt{13}$

Step-by-step explanation:

x² - 6x - 4 = 0 ( add 4 to both sides )

x² - 6x = 4

To complete the square

add ( half the coefficient of the x- term)² to both sides

x² + 2(- 3)x + 9 = 4 + 9

(x - 3)² = 13 ( take square root of both sides )

x - 3 = ± $\sqrt{13}$ ( add 3 to both sides )

x = 3 ± $\sqrt{13}$

6 0

2 years ago

Due in 1 hour, plz help

snow_lady [41]

Answer:

1. 12/1= rate of change

Step-by-step explanation:

1 mile= 30 seconds

(1,30)

6 miles= 1 1/2 minutes

6 miles=90seconds

(6,90)

Formula: y2-y1/x2-x1

90-30/6-1

60/5

12/1= rate of change

hope its right

3 0

3 years ago

Hal has a steel barrel with a diameter of 6 feet that can be filled to a depth of 4.6 feet with oil. What is the volume of the b

scoray [572]

Answer:

129.996 cubic feet

Step-by-step explanation:

Assuming that the barrel is a perfect cylinder, we can use the formula to find the volume:

$\pi(r)^2(h)$

First, we have to find the radius, which is:

D = 2r

So the radius is 3 feet, since it is half of the diameter. Then, we plug in the values.

$3.14(3)^2(4.6)$

Now, we solve. Exponents are first...

3.14(9)(4.6)

Now multiply left to right.

28.26(4.6)

129.996 cubic feet

Therefore, the barrel can hold 129.996 cubic feet of oil. Hope this helps you!

3 0

3 years ago