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notka56 [123]
4 years ago
14

What makes (a + 2)(b – 9) = 0 true?

Mathematics
2 answers:
prohojiy [21]4 years ago
5 0
B would have to equal 9 and a should equal -2 to get 0
Ainat [17]4 years ago
3 0
Hm answer a should be -2 and answer b should be 9
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abby went to the movies and buy a large container of popcorn. The popcorn container can be modeled by a right circular cone with
DanielleElmas [232]

Answer:

$1.918

Step-by-step explanation:

The volume of a right circular cone is obtained using the formular :

V = 1/3πr²h

From the question:

Diameter = 9 inches ; height = 10 inches

Radius = diameter /2 = 9/2 = 4.5 inches

V = 1/3*π*4.5²*10

V = 211.95 in³

Volume in ft³ = 211.95 / 1728 = 0.12265625 ft³

Density of popcorn = 34 ounces / ft³

Density of popcorn CONTAINER = x

1 ft³ = 34 ounce

0.12265625 ft³ = x

Cross multiply

x = 34 * 0.12265625 ft³

x = 4.1703125 ounce

Hence, popcorn continer has a density of 4.1703125 ounce

If price per container = $8

The price per ounce = $8 / 4.1703125

= $1.918

Hence, price per ounce is $1.918

3 0
3 years ago
A triangle has a base of 8 cm and a height of 12 cm. What is the area of the triangle? Enter your answer in the box. Cm?
Olin [163]

Answer:

The area is 48 cm^2

Step-by-step explanation:

The formula for area of a triangle is

A = 1/2 b*h

A = 1/2 * 8cm*12cm

A = 1/2 *96cm^2

A = 48 cm^2

The area is 48 cm^2

4 0
4 years ago
hree girlfriends (Karen, Tara, and Chelsea) each buy ice cream and paper back novels to enjoy on hot summer days. Ice cream cost
LUCKY_DIMON [66]

Answer:

  Karen

Step-by-step explanation:

8 gallons of ice cream at $5 per gallon will cost $40. 5 paperback novels at $8 per novel will also cost $40. Only Karen has a budget sufficient to cover the $40+40 = $80 total.

6 0
3 years ago
A machine can grade 30 tests in 2 minutes. At this rate, how long will it take the machine to grade 135 tests?
Nonamiya [84]

Answer:

9 minutes

Step-by-step explanation:

(2 min(60 s/min)) / 30 test = 4 s/test

135 test(4 s/test) = 540 s

540s / 60 s/min = 9 min  

8 0
3 years ago
Read 2 more answers
zack bought a coat for $ 69.78 he paid with a $100 bill and received $26.73 in change. how much was the sales tax ?
Orlov [11]
$29.22 because $100-$70.78=$29.22
Hope I helped let me know.
7 0
4 years ago
Read 2 more answers
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