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3 years ago

{y = 3x -1 {x-y = - 9

2 answers:

8 0

Always make sure both the equations have equal notations so 3x-y=1 and x-y=0
after the that u may use the normal simultaneous eqn and find values of x and y

photoshop1234 [79]3 years ago

8 0

Here, substitute the value of y from equation 1 into equation 2,
x - y = -9
x - (3x - 1) = -9
x - 3x + 1 = -9
-2x = -9 - 1
x = -10/-2
x = 5

Now, substitute the value in 1st equation,
y = 3(5) - 1
y = 15 -1 = 14

In short, Your Answer would be: (5, 14)

Hope this helps!

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A new, trendy department store is experiencing exponential growth across America. The chain began in 2004 when it opened 16 stor

QveST [7]

The equation is y=16(1.35)ˣ.

This equation is of the form y=a(1+r)ˣ, where a is the initial amount, r is the rate of growth expressed as a decimal number, y is the total, and x is the amount of time. For our problem, a is 16; b is 0.35 (35%=35/100=0.35). This gives us the equation above.

7 0

3 years ago

Initially a wheel rotating about a fixed axis at a constant angular deceleration of 0.5 rad/s 2 has an angular velocity of 0 rad

Zigmanuir [339]

Answer:

$\theta = 5.83\ rad$

Step-by-step explanation:

given,

angular deceleration, α = -0.5 rad/s²

final angular velocity,ω_f = 0 rad/s

angular position, θ = 6.1 rad

angular position at 3.9 s = ?

now, Calculating the initial angular speed

$\omega_f^2 = \omega_i^2 + 2 \alpha \theta$

$0 = \omega_i^2 - 2\times 0.5\times 6.1$

$\omega_i = \sqrt{6.1}$

$\omega_i = 2.47\ rad/s$

now, angular position calculation at t=3.9 s

$\theta = \omega_i t + \dfrac{1}{2}\alpha t^2$

$\theta =2.47\times 3.9 - \dfrac{1}{2}\times 0.5\times 3.9^2$

$\theta = 5.83\ rad$

Hence, the angular position of the wheel after 3.9 s is equal to 5.83 rad.

7 0

3 years ago

5(x+21)= 8x help me please

chubhunter [2.5K]

Answer:

Step-by-step explanation:

Steps

1. 5x + 105 = 8x because you distributed the 5

2. 105 = 3x because you subtract the 5x on both sides

3. 105/3 = x because you divide the 3 and 105/3 is 35

5 0

2 years ago

) Mr. Rivera is making a healthy dessert for his nephew who has diabetes. He wants

Rus_ich [418]

Answer:

see below

Step-by-step explanation:

Apple crisp has

8 servings and contains 80 grams of sugar.

80 grams / 8 servings = 10 grams per serving

Greek frozen yogurt has

12 servings and contains 60 grams of sugar.

60 grams / 12 serving = 5 grams per serving

He should make Greek frozen yogurt

8 0

3 years ago

Read 2 more answers

If the company provides 1 1/4 vacation days to its employees every month,how many vacation days does an employee get every year?

FromTheMoon [43]

We know there are 12 months in a year so we would multiply 1 1/4 by 12. We can write 1 1/4 as 1.25 (to make it easier to multiply). 12x1.25=15
Your answer is 15 vacation days in one year

5 0

3 years ago