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3 years ago

11. Ms. Merrill spends

Mathematics

2 answers:

Vilka [71]3 years ago

7 0

Time on floor one+time on floor two=55

55/2=time on each floor

55-time on floor one=time on floor two

stepladder [879]3 years ago

7 0

Answer: Ans. one: 27.5 min. on each floor | Ans. Two: 55 min on first floor. | Ans. Three: 55 min on second floor.

Step-by-step explanation:

Ans. One: Say there are the same amount of windows on each floor. She takes the same amount of time to wash each floor's windows. 55 / 2 = 27.5.

Ans. Two: There are no windows on the first floor. It takes her 55 min. in total. 55 min. to do one floor.

Ans. Three: There are no windows on the second floor. It takes her 55 min. in total. 55 min. to do one floor.

Hope this helps! <3

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A2 = -8 and a5 = -512 Find a10

yawa3891 [41]

Answer:

The value of a₁₀ is -1352

Step-by-step explanation:

a₂ = -8

a₅ = -512

Now,

a₂ = -8 can be written as

a + d = -8 ...(1) and

a₅ = -512 can be written as

a + 4d = -512 ...(2)

Now, from equation (2) we get,

a + 4d = - 512

a + d + 3d = - 512

(-8) + 3d = - 512 (.°. a + d = -8)

3d = - 512 + 8

3d = - 504

d = - 504 ÷ 3

d = - 168

Now, for the value of a put the value of d = -168 in equation (1)

a + d = -8

a + (-168) = -8

a - 168 = -8

a = 168 - 8

a = 160

Now, For a₁₀

a₁₀ = a + 9d

a₁₀ = 160 + 9(-168)

a₁₀ = 160 - 1512

a₁₀ = -1352

Thus, The value of a₁₀ is -1352

-TheUnknownScientist

8 0

3 years ago

In a certain chemical, the ratio of zinc to copper is 3 to 17. A jar of the chemical contains 799 grams of copper. How many gra

dezoksy [38]

Answer:

let's see what to do buddy...

Step-by-step explanation:

$\frac{zinc}{copper} = \frac{3}{17} \\ \\ \frac{zinc}{799} = \frac{3}{17}$

Multiply the sides of the equation by 799

$zinc = \frac{3}{17} \times 799 \\ \\ zinc = \frac{3}{17} \times 17 \times 47 \\ \\ zinc = 3 \times 47 = 141$

So A jar of the chemical contains 141 grams of zinc.

And we're done.

Thanks for watching buddy good luck.

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3 years ago

Ben sells homemade cards at a craft fair. He wants to earn more than $50 at the fair. He sells his cards for $2 and he has alrea

Kryger [21]

Answer:

He must sell 8 cards to reach the minimum goal.

Step-by-step explanation:

Giving the following information:

He wants to earn more than $50 at the fair.

He sells his cards for $2 and he has already earned $36.

First, we need to calculate the money required to reach the minimum goal:

51 - 36= $15

Now, we write the inequality:

2*x >15

x= number of cards sold.

x>15/2

x> 7.5

He must sell 8 cards to reach the minimum goal.

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3 years ago

Use the proportion. What is 72% of 150

kherson [118]

Answer:

108

Step-by-step explanation:

150x0.72=108

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2 years ago

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disa [49]

Answer- 85,7 g
300:7= 42,85
42,85x2=85,7

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3 years ago