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jek_recluse [69]

3 years ago

13

Zoe said the best way to estimate 2,498 - 639 is to round each number to the nearest hundred. Sam said the best way to estimate

inks to round each number to the nearest thousand. Who is correct? explain your answer.

1 answer:

kicyunya [14]3 years ago

8 0

Answer:

sam is correct

Step-by-step explanation:

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A landscaper has enough cement to make a patio with an area of 150 Sq ft. The homeowner wants the length of the patio to be 6 ft

Natasha_Volkova [10]

$A=lw=150\\l=w+6\\(w+6)w=150\\w^2+6w=150\\w^2+6w-150=0\\w=\frac{-b+-\sqrt{b^2-4ac}}{2a}\\w=\frac{-(6)+-\sqrt{(6)^2-4(1)(-150)}}{2(1)}\\w=\frac{-6+-\sqrt{36+600}}{2}\\w=\frac{-6+-\sqrt{636}}{2}\\w=\frac{-6+-2\sqrt{159}}{2}\\w=-3+-\sqrt{159}>0\\w=-3+\sqrt{159}\\\\l=(-3+\sqrt{159})+6\\l=3+\sqrt{159}$

Width = -3 + sqrt(159)
Length = 3 + sqrt(159)

4 0

3 years ago

The Mary boat cruise line charges a non-refundable fee of $150 and a fee of $280 a day on the cruise ship. The Billy Boat cruise

White raven [17]

You would set it up like this: 150x + 280 = 255x The you just solve.

8 0

3 years ago

State the intervals for which the given quadratic is positive and when it is negative.

goblinko [34]

Answer:

Positive at (-9, 2)
Negative at ( -oo, -9) or (2, + oo)

Step-by-step explanation:

<u>Given function</u>

y= -2x^2 - 14x + 36

<u>Getting zero's</u>

-2x^2 - 14x + 36 = 0
x^2 + 7x - 18 = 0

x = ( -7 ± √(49 +72))/2 = ( -7 ± 11)/2
x = - 9 and x = 2

<u>As the x^2 has negative coefficient, the function is positive between -9 and 2</u>

- 9 < x < 2 or
(-9, 2)

<u>And it is negative at:</u>

x < -9 and
x > 2
or
( -oo, -9) or (2, + oo)

3 0

3 years ago

I need help with this problem if anyone wants to help me please do

natima [27]

Answer:

11

Step-by-step explanation:

hope this helps loves x

7 0

2 years ago

Read 2 more answers

18x^2+24x=0 Please solve by factoring.

Harman [31]

Answer:

6x ( 3x +4)

X =0 and x = 4/3 or x = 1 1/3

Step-by-step explanation:

Take the common factors out,

Here x is common to both equation and also 6 is common to both equation

So,

6x ( 3x + 4) = 0

So it can be solved by

X = 0 and x = 4/3

4 0

3 years ago