3 years ago

Help me please I don't understand plz give me th answer

Mathematics

2 answers:

mestny [16]3 years ago

6 0

Set up a ratio:

4 gallons / 30 plants = X gallons / 45 plants

Cross multiply:

4 * 45 = 30 * x

180 = 30x

Divide both sides by 30:

x = 180 / 30

x = 6

It would take 6 gallons.

lora16 [44]3 years ago

3 0

Answer:

Step-by-step explanation:

4 gallons=30 plants

then

x gallons=45 plants

by cross multiplication of both the equations

x = (45*4)/30

x=180/30

x=6

Hence 6 gallons are used to water 45 plants

You might be interested in

Ms.jones has a decorative pyramid that sits on her fireplace mantle .the base is an equilateral triangle with an area of 6 squar

levacccp [35]

ion know but 7 :Ddfsdf

8 0

3 years ago

Without actual division prove that x4 +2x3 -2x2 +2x -3 is exactly divisible by<br> x2 +2x-3

Brut [27]

Answer:

Step-by-step explanation:

$\displaystyle\Large\boldsymbol{} x^4+2x^3-2x^2+2x-3= \\\\\\x^4+2x^2(x-1)+2x-\underbrace{2-1}_{-3}= \\\\\\x^4-1+2x^2(x-1)+2x-2 = \\\\\\(x^2-1)(x^2+1)+2x^2(x-1)+2(x-1) = \\\\\\\underline{(x-1)}(x+1)(x^2+1)+2x^2\underline{(x-1)} +2\underline{(x-1)} =\\\\\\(x-1)((x+1)(x^2+1)+2x^2+2)=\\\\\\(x-1)(x^3+x^2+2x^2+x+2+1)=\\\\\\(x-1)(x^3+3x^2+x+3) =\\\\\\(x-1)( \underline{(x+3)}x^2+\underline{(x+3)})=(x^2+1)\underbrace{(x-1)(x+3)}_{x^2+2x-3}= \\\\\\(x^2+1)(x^2+2x-3) : (x^2+2x-3)=x^2+1$