Answer this problem. i need to find y.

a = - 2.77 m/s², westwards

Explanation:

Given:

Time, t = 3 seconds

Final velocity of the car, v = 4.50 m/s

Distance, s = 26 m

Now,

from Newton's equation of motion

v = u + at

where,

u is the initial speed of the car

a is the acceleration

on substituting the respective values, we get

4.5 = u + a × 3

or

u = 4.5 - 3a

also,

on substituting the value, we get

or

26 = 13.5 - 9a + 4.5a

or

- 4.5a = 12.5

or

a = - 2.77 m/s²

here, the negative sign depicts that the acceleration is in opposite direction to the motion of the car.

Thus, the direction of the car is opposite to the eastward i.e westwards

I think the answer is the one about environmental and social health.

Hope this helps!!

Set ? as x, and cross-multiply.

so x^2= 36

x = 6 or x = -6

The total cost of the grapes, obtained by multiplying the quantity by the unit price = $8.25.

Step-by-step explanation:

It implies that 3 grapes were purchased and the cost of each is $2.75 per unit.

Therefore, the total cost of the grapes will be given by the following 3*2.75 or quantity multiplied by unit price,

which is equal to 8.25 after multiplication.  Then the dollar sign or any other currency sign is added to depict value in monetary terms.

There are 6 skateboards and 15 bicycles.

Step-by-step explanation:

Consider the provided information.

Let x is the number of skateboards and y is the number of bicycles in his repair shop.

Uncle Eddie asked McKenna and Lara to order 54 new wheels for the 21 skateboards and bicycles in his repair shop.

There are 21 skateboards and bicycles in his repair shop.

......(1)

Each skateboard has 4 wheels, for x skateboards he needs 4x wheels, each bicycle has 2 wheels, for  y bicycles he needs 2y wheels. In total there should be ordered 54 wheels, so

Substitute the value of x in above equation.

Substitute the value of y in equation 1.

Hence, there are 6 skateboards and 15 bicycles.

x = 136/35; y = -⁹/₁₀

Step-by-step explanation:

(1)         7x + 8y = 20

(2)        7x – 2y = 29       Subtract (2) from (1)

                  10y =  -9        Divide each side by 10

(3)                 y =  -⁹/₁₀     Substitute (3) into (1)

      7x - 2(-⁹/₁₀) = 29

      7x + 18/10  = 29                       Subtract 18/10 from each side

      7x              =      29 - 18/10

      7x              = (290 - 18)/10

      7x              =          272/10        Divide each side by 7

        x              =           272/70

        x              =           136/35

x = 136/35; y = -⁹/₁₀

Check:

(1) 7(136/35) + 8(-⁹/₁₀) = 20

      136/5    -   72/10 = 20

      136/5    -   36/5  = 20

                      100/5  = 20

                       20      = 20

(2) 7(136/35) – 2(-⁹/₁₀)  = 29

       136/5    +    18/10 = 29

       136/5    +      ⁹/₅    = 29

                        145/5  = 29

                        29       = 29

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10