All categories

3 years ago

Select all the expressions that are equivalent to -36x+54y−90.

Mathematics

2 answers:

CaHeK987 [17]3 years ago

7 0

Answer:

b) -18(2x -3y + 5)

d) 18(-2x + 3y - 5)

e) -2(18x - 27y + 45)

Step-by-step explanation:

a) -9( 4x - 6y - 10) = -36x + 54y + 90 not equal

b) -18(2x - 3y + 5) = -36x + 54y - 90 equal

c) -6(6x + 9y - 15) = -36x - 54y + 90 not equal

d) 18(-2x + 3y - 5) = -36x + 54y - 90 equal

e) -2(18x - 27y + 45) = -36x + 54y - 90 equal

f) 2(-18x + 54y - 90) = -36x + 108y - 180 not equal

Lorico [155]3 years ago

6 0

Answer:

A. -9(4x-6y-10). B. -18(2x-3y+5)

=-36x+54y+90. = -36x+54y-90

=18xy+90. =18xy-90

=108xy. =-72xy

C. -6(6x+9y-15)

=-36x-54+90

=-90xy +90

=0xy

You might be interested in

The population of Anytown is 8000. It is predicted to increase by 5% in one year. What is the predicted population after one yea

solmaris [256]

800 is what I think

8 0

3 years ago

Read 2 more answers

A store is having a sale in which the cost of any item is 35% off. Which expression can be used to find the cost, x, of an item

Mekhanik [1.2K]

Answer:

73373773737477374747373738

3 0

3 years ago

i observed 24 students walking pass room 26 every 4 minutes. A total of 305 students walked by, how long did it take?

svlad2 [7]

It took about 51 minutes...

7 0

3 years ago

Help me with this,i really forgot how to do these type of questions

Montano1993 [528]

Work=speed times time (my equation to help me figure it out)

ok, 10 men take 84 days to complete a job
therefor, each man completes 1/10 of the job in 84 days
each man does 1/840 of the job per 1 day

so, if we had 5 more, or 15 men

15 times 1/840 times xdays=1 job complete
15/840 times xdays=1job
times both sides by 840/15
xdays=840/15
xdays=56
56 days it would take

5 0

3 years ago

With reference to the figure, sin X equals?<br> 1.) 0.250<br> 2.)0.447<br> 3.)0.894<br> 4.)1

Flura [38]

Answer:

3.) 0.894

Step-by-step explanation:

✔️First, find BD using Pythagorean Theorem:

BD² = BC² - DC²

BC = 17.89

DC = 16

Plug in the values

BD² = 17.89² - 16²

BD² = 64.0521

BD = √64.0521

BD = 8.0 (nearest tenth)

✔️Next, find AD using the right triangle altitude theorem:

BD = √(AD*DC)

Plug in the values into the equation

8 = √(AD*16)

Square both sides

8² = AD*16

64 = AD*16

Divide both sides by 16

4 = AD

AD = 4

✔️Find AB using Pythagorean Theorem:

AB = √(BD² + AD²)

AB = √(8² + 4²)

AB = √(64 + 16)

AB = √(80)

AB = 8.9 (nearest tenth)

✔️Find sin x using trigonometric ratio formula:

Reference angle = x

Opposite side = BD = 8

Hypotenuse = AB = 8.944

Thus:

$sin(x) = \frac{opp}{hyp} = \frac{8}{8.944} = 0.894$ (nearest thousandth)

6 0

3 years ago