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Sergeeva-Olga [200]
3 years ago
12

PLEASE HELP!!!!!!

Mathematics
2 answers:
aksik [14]3 years ago
6 0

Answer: the answers are 1.8 and 3.2 seconds. So both B and C.

Step-by-step explanation:

Bad White [126]3 years ago
5 0

Answer:

Option 1 and 3 - 1.3 seconds and 3.2 seconds

Step-by-step explanation:

Given : The equation that models the height above or below equilibrium in inches, h, of a spring over time in seconds, t, is h=-30\cos(\frac{2\pi}{5} t).

To find : At which times will the spring be at a height of 20 in. above equilibrium?        

Solution :

We have given,              

The equation that models the height above or below equilibrium in inches      

h=-30\cos(\frac{2\pi}{5} t)

We have to find at h=20 inches the time of spring.

We show it graphically,

Plot the graph of the model  h=-30\cos(\frac{2\pi}{5} t)

Then, Substitute h=20

The points of their intersections are the solution of the model.

The intersection points are (1.831,20), (3.169,20) and many more.

From the given options,

The time are 1.3 seconds and 3.2 seconds.

Therefore, Option 1 and 3 are correct.    

Refer the attached figure below.  

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Please help me on this problem. ​
Len [333]

Answer:

Step-by-step explanation:

Problem 4a

You have 6 numbers on the cube, a bag with 4 letters and a spinner with 3 letters

The total number of results is

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Problem 4b

P(A,3,Q) = (1/3)(1/6)(1/4) = 1/72

Problem 4c

A and Q remain the same. 1/3 and 1/4

Not rolling a 6 is a little different. Success will result in a 1 2 3 4 5 being thrown.  That's 5/6

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4 0
3 years ago
In the diagram above which two red lines are parallel
vlabodo [156]
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3 years ago
Make w subject of formula<br> C=(4+w)/(w+3)
grin007 [14]

Answer:

Step by Step Solution

More Icon

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

c-((4+w)/(w+3))=0

STEP

1

:

4 + w

Simplify —————

w + 3

Equation at the end of step

1

:

(w + 4)

c - ——————— = 0

w + 3

STEP

2

:

Rewriting the whole as an Equivalent Fraction

2.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using (w+3) as the denominator :

c c • (w + 3)

c = — = ———————————

1 (w + 3)

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

c • (w+3) - ((w+4)) cw + 3c - w - 4

——————————————————— = ———————————————

1 • (w+3) 1 • (w + 3)

Equation at the end of step

2

:

cw + 3c - w - 4

——————————————— = 0

w + 3

STEP

3

:

When a fraction equals zero :

3.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

cw+3c-w-4

————————— • w+3 = 0 • w+3

(w+3)

Now, on the left hand side, the w+3 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

cw+3c-w-4 = 0

Solving a Single Variable Equation:

3.2 Solve cw+3cw-4 = 0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

We shall not handle this type of equations at this time.

6 0
2 years ago
Read 2 more answers
a submarine travel 184.4 meters below the water's surface. It took 23 1/2 minutes maintain a speed during a recent how far did y
cupoosta [38]

If the submarine descended 184.4 meters in 23.5 minutes, its rate of descent was ...

... (184.4 m)/(23.5 min) ≈ 7.847 m/min

The submarine descended about 7.85 meters in one minute.

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