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omeli [17]
2 years ago
10

Please help me 20 points

Mathematics
1 answer:
valina [46]2 years ago
7 0

Step-by-step explanation:

I would think it is Q but not 100% sure

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Michael can bike 2 miles in 12 minutes how long will it take him to bike 7 miles
stich3 [128]

42 minutes for 7 miles

6 0
2 years ago
A brick of mass 4 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is t
Zielflug [23.3K]

Answer:

Step-by-step explanation:

In this system we have the force of the spring and the gravitational force. The equation that describes that is

F_{s}+F{g}=ma\\k(y_0+y)-mg=ma

where y0 is the equilibrium position when the string is free and y0+y is the new equilibrium position when the object is hanged of the string. By replacing by derivatives we have

ky_0+ky-mg=ma\\mg+ky-mg=ky=ma\\\\ky=m\frac{d^2y}{dt^2}\\\\my''+ky=0

the solution for this differential equation is (by using the characterisic polynomial)

y(x)=Acos(kt)+Bsin(kt)\\k=\omega^2m

hope this helps!!

7 0
3 years ago
Read 2 more answers
-2(7a+4b)-6c=<br> Simplify
jeka94

Answer:

Because of the minus sign

2 becomes - 2

The answer is -2

Multiply a and 7

Multiply a and 1

The a just gets copied along.

The answer is a

a

7*a evaluates to 7a

Multiply b and 4

Multiply b and 1

The b just gets copied along.

The answer is b

b

4*b evaluates to 4b

7*a+4*b evaluates to 7a+4b

Multiply -2 by 7a+4b

we multiply -2 by each term in 7a+4b term by term.

This is the distributive property of multiplication.

Multiply -2 and 7a

Multiply 1 and a

The a just gets copied along.

a

-2 × 7a = -14a

Multiply -2 and 4b

Multiply 1 and b

The b just gets copied along.

b

-2 × 4b = -8b

-2*(7*a+4*b) evaluates to -14a-8b

Multiply c and 6

Multiply c and 1

The c just gets copied along.

The answer is c

c

6*c evaluates to 6c

The answer is -14a-8b-6c

-2*(7*a+4*b)-6*c evaluates to -14a-8b-6c

The final answer is

-14a-8b-6c

Step-by-step explanation:

Please mark brainliest and have a great day!

4 0
2 years ago
Can anyone help me with my algebra 2 test ?
Lera25 [3.4K]

Answer:

what do you need?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Shirley Smith's total insurance premium is $1,050. His employer pays 50% of the total premium. How much does Shirley pay?
allsm [11]

Answer:

$525

Step-by-step explanation:

Shirley pays the other 50%, so pays ...

0.50 · $1050 = $525

8 0
3 years ago
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