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3 years ago

3(x+1)=2(x-3) whats the answer

Mathematics

2 answers:

ZanzabumX [31]3 years ago

8 0

The answer is -9

I dont know the step-by-step used a calculator

AnnyKZ [126]3 years ago

7 0

Answer:

x= -9

Step-by-step explanation:

1. distribute

3(+1)=2(−3)

so it would look like this:

3+3=2x-6

2. subtract 3 from both sides

It would look like this:

3x=2x-9

3. subtract 2x from both sides

It would look like this:

x= -9

And that is your answer!!

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A new airport is in its planning phase. One particular challenge is that there are several tall buildings in the vicinity. In pa

mixer [17]

Answer:

Could an airplane take off and clear this tall building? YES

Step-by-step explanation:

Trigonometry

The building and the ground form a right (90°) angle. The path of the airplane (assumed a straight line) completes the right triangle.

The takeoff angle of the plane θ=15° has the height of the building (450 feet) as the opposite side and the horizontal distance from the end of the runway (2500 feet) as the adjacent side.

The tangent of θ is defined as the following ratio:

$\displaystyle \tan\theta=\frac{\text{opposite leg}}{\text{adjacent leg}}$

$\displaystyle \tan \theta=\frac{450}{2500}$

$\displaystyle \tan \theta=0.18$

Calculating the inverse tangent function:

$\theta=\arctan 0.18$

$\theta\approx 10^\circ$

This means the angle needed to clear the tall building is about 10° and it's within the maximum airplane's takeoff angle.

Could an airplane take off and clear this tall building? YES

8 0

3 years ago

John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

Find the value of x

$x=5(8)=40$

Find the value of z

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

7 0

3 years ago

a ticket to a school dance is $8 ). usually, 300 students attend. the dance committee knows that for every $1 increase in price

Nataliya [291]

8 x 300 = 2400
9 x 270 = 2430
10 x 240 = 2400
11 x 210 = 2310
the max revenue would be $9

3 0

4 years ago

Help pls!! giving brainliest :)

RideAnS [48]

Answer:

the answer is 5

Step-by-step explanation:

i hope its right if its not im so sorry plz dont rost me in the comments

5 0

3 years ago

Number 2 is what I'm stuck on

DENIUS [597]

Let's say that ground level is 0. When she goes down to the basement, she is going -12 feet since each flight of stairs is12 feet. Then she goes up 12 more feet= -12+12=0. She is back at ground level. Then she goes up another 12 feet= 0+12= 12. So I believe the answer is 12 feet.

5 0

4 years ago