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Studentka2010 [4]

3 years ago

13

X^3-13x^2+40x=0 quadratic

1 answer:

lutik1710 [3]3 years ago

6 0

Answer:

x(x-5)(x-8)

or

x=5

x=8

Step-by-step explanation:

x(x^2-13x+40)
x(x-5) (x-8)

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The Coffee Counter charges $8 per pound for Kenyan French Roast coffee and $7 per pound for Sumatran coffee.

spayn [35]

Answer:

Kenyan French Roast coffee x=6

Sumatran coffee y=14

Step-by-step explanation:

x+y=20 blend coffee

8x+7y=7.3(20) selling price

x+y=20 ⇒ x=20-y

substitute in the equation:

8x+7y=7.3(20)

8(20-y)+7y=7.3(20) for 20 pound blend

160-8y+7y=146

-y=146-160

y=14 pond

x+y=20

x=20-14=6

check : 14*7+6(8)=146/7.3=20 pound

4 0

3 years ago

Sean can spend at most $15.00 on snacks. He has already spent $5.00. Which inequality could be solved to determine how much mone

Lady bird [3.3K]

Answer:

5 + x ≤ 15

Step-by-step explanation:

4 0

3 years ago

Suppose f varies inversely with g and that f = 28 when g = 2. What is the value of f when g = 7?

Lesechka [4]

Make up the proportion

$28*2=x*7\\7x=56\\x=8$

P.S. Hello from Russia

3 0

3 years ago

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DiKsa [7]

Answer:

12x - 6

Step-by-step explanation:

8x - 3 + 4x - 3

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6 0

3 years ago

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The area of South America is approximately 1.78 × 107 square kilometers. Its population is approximately 3.50 × 108 people. What

stepladder [879]

Answer:

<u>A) 19.66 people/km²</u>

Step-by-step explanation:

<u>Given</u>

Area of the continent = 1.78 x 10⁷ km²
Population = 3.5 x 10⁸ people

<u>To Find</u>

Population Density

<u>Solving</u>

population density is the number of people per unit area
pd = people / area
pd = 3.5 x 10⁸ / 1.78 x 10⁷
pd = 1.966 x 10
pd = <u>19.66 people/km²</u>

6 0

2 years ago