Saturday

September 20, 2014

September 20, 2014

Posted by **Janae** on Wednesday, February 22, 2012 at 9:50pm.

2. z^2 + 65z + 1000

3.x^2 - 45x + 450

4.d^2 - 33 d - 280

- Algebra 1 -
**cariissa**, Wednesday, February 22, 2012 at 10:05pmThe area of a rectangular field is given by the trinomial t2 – 4t – 45. The length of the rectangle is t + 5. What is the expression for the width of the field?

- Algebra 1 -
**Reiny**, Wednesday, February 22, 2012 at 10:10pmMathMate already did one of them for you

http://www.jiskha.com/display.cgi?id=1329964907

why not try his method for the others.

I will do the last one: d^2 - 33d - 280

280 = 56x5 , difference in factors of 33 ? no

280 = 40x7 , difference in factors of 33 ? YES

-280 = -40 x 7 , (-40) + 7 = -33

so

d^2 - 33d - 280 = (d - 40)(d + 7)

ok, your turn

Show us how you would do the other two.

- For cariissa -
**Reiny**, Wednesday, February 22, 2012 at 10:14pmPlease do not insert a new question as a reply to somebody else's question.

All you have to do is factor t^2 - 4t -45

To make it really simple, one of the factors is already given, so

t^2 - 4t - 45 = (t+5)(........)

you know it has to start with (t ......) and end in (.....-9)

so (t+5)(t-9)

does that produce a middle term of -4t ?? , YES

so we are done.

the width is t-9

- Algebra 1 -
**Janae**, Wednesday, February 22, 2012 at 10:24pm1000=2x500

1000=4x250

1000=5x200 dont none of them work

**Answer this Question**

**Related Questions**

math - factor the trinomial. 1. m^2-7m-30 2. z^2+65z+1000 3.x^2-45x+450 4.d^2-...

algebra* - Find the following product: -9x^5y(-5x^4y^6) A)-14x^9y^7 B)45x^9y^7 C...

Algebra - Find the product: -9x(-6x2 + x + 5) A.54x2 – 9x – 45x B.-15x3 – 8x2 – ...

Calc - find the area between y=x^3–14x^2+45x and y=–x^3+14x^2–45x i am having ...

Mtahs Metre to millimetres - Hi, Can anyone please check the following ...

algebra - 45x^2+42x+9

elementary algebra - 4x^2-45x+50=0

Math expression - If the customer uses more than 450 minutes the payment is $39....

Algebra - Find two consecutive even integers that have a sum of 450. 224+226=450...

algebra - Factor the following expression completely: 45x^3y – 80xy