Need help with two math questions please asap! Thank you!

Mathematics

2 answers:

IrinaK [193]3 years ago

8 0

The answers are:
x
X^2 -5x +6

patriot [66]3 years ago

4 0

My natural tendency is to FIOL instead of FOIL but it doesn't matter.

(x+5)(x-6)

Firsts: x times x

Outers: x times -6 = -6x

Inners: 5 x

Lasts: 5(-6)=-30

Outers+Inners = -6x + 5x = -x

Answer: -x

(x-2)(x-3)=x^2-3x-2x+6=x^2-5x+6

Answer: second choice

You might be interested in

Joe will build a rectangular pen for his dog. A wall will form one side of the pen. Joe has 40 ft of fencing to form the other t

Svetlanka [38]

Material=wall+2*side and material is 40 ft so:

40=w+2s

w=40-2s

Area=ws, using w from above we get:

A=(40-2s)s

A=40s-2s^2

dA/ds=40-4s and d2A/ds2=-4

Since d2A/ds2 is a constant negative acceleration, when dA/ds=0, A(s) is at an absolute maximum.

dA/ds=0 when 4s=40, s=10 ft

And since w=40-2s, w=20 ft

So the dimensions of the pen are 20 ft by 10 ft, with the 20 ft side being opposite the wall. And the maximum possible area is thus 200 ft^2

6 0

3 years ago

Read 2 more answers

at a local preschool there is a ratio of 4 of 3 boys to every 4 girls if there are 245 total preschoolers enrolled how many are

TiliK225 [7]

There are 105 boys. and 140 girls

4 0

3 years ago

When servicing a heating boiler and radiators, a plumer knows that the time he will take is given by the formula

Allushta [10]

Answer:

£110

Step-by-step explanation:

We know how much time it takes for a boiler and a radiator, and we need to know how much it will cost for 1 boiler and 4 radiators. We have an initial cost of £30, and since hes doing a boiler - which we know takes an hour - we can already add £20 for a start of £50.

Now, there are 4 radiators, that take 45 minutes each. We need to use this equation:

$(45*4)/60$

We divide by 60 because there are 60 minutes in an hour, and he charges by hour. So:

$180/60=3$

Now, to find out how much to charge, we need to figure out how much to add to the £50. Since it's £20 an hour, and it takes 3 hours to do the 4 radiators, we need to multiply:

$3*20=60$