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3 years ago

3x + 9y = -42 -3x + 2y = -2 The solution to the system is

Mathematics

1 answer:

AlladinOne [14]3 years ago

6 0

x=−2 and y=−4

If you need explanation Just ask!

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An airplane begins decreasing its altitude as it approaches the runway. At time t=1, the pilot notes that he has an altitude of

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4th one btw I was a prospect elite on Brainly but I got banned

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3 years ago

If a car is traveling at 70 mph, how fast is the car traveling in feet per second? Round to 2 decimal places. (Reminder: there a

alukav5142 [94]

Answer:

264000

Step-by-step explanation:

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3 years ago

In the calm waters of an inlet, Manon's boat moves with a velocity (speed and direction) vector \vec{b_1} = (3,4) b 1 =(3,4)

andrew-mc [135]

Answer with Step-by-step explanation:

We are given that

$b_1=(3,4)$

$b_2=(1,1)$

We have to find the speed of river's current and the direction of current flowing.

$b=b_2-b_1=(1,1)-(3,4)=(-2,-3)$

Speed of river's current= $\mid b\mid$

Speed of river's current= $\sqrt{(-2)^2+(-3)^2}$

Speed of river's current= $\sqrt{13} m/s$

By using the formula

$\mid r\mid =\sqrt{x^2+y^2}$

Direction of current flowing, $\theta=tan^{-1}(\frac{y}{x})$

$\theta=tan^{-1}(\frac{-3}{-2})=56.3^{\circ}$

The angle lies in third quadrant therefore

$\theta=180+56.3=236.3^{\circ}$

3 0

3 years ago

A family is measuring its house in order to figure out how much paint will be

tester [92]

Answer: How much paint

The independent variable is the measuring of the house

5 0

3 years ago

Shen borrowed $8000 at a rate of 12%, compounded semiannually. Assuming he makes no payments, how much will he owe after 7 years

Alexandra [31]

Answer:

$18,087.23

Step-by-step explanation:

The future worth of the loan in 7 years compounded semiannually is computed as shown below using the future value formula adjusted for semiannual compounding:

FV=PV*(1+r/2)^n*2

FV is the worth of the loan in 7 years which is unknown

PV is the actual amount of loan which is $8,000

r is the rate of interest of 12%

n is the number of years of the loan which is 7 years

the 2 is to show that interest is computed twice a year

FV=8000*(1+12%/2)^7*2

FV=8000*(1+6%)^14

FV=8000*1.06^14=$18,087.23

4 0

3 years ago