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2 years ago

(b) Ivanna bought 9 pounds of flour for $5. How many pounds of flour did she get per dollar?

Mathematics

1 answer:

ivanzaharov [21]2 years ago

4 0

Answer:

1.8 pounds per dollar

Step-by-step explanation:

Take the pounds and divide by the dollars

9 pounds / 5 dollars

1.8 pounds per dollar

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What is 6 over 9 simplified

Snezhnost [94]

Answer:

2/3

Step-by-step explanation:

$\frac{6}{9}$

$\frac{6}{9} = \frac{2 \times 3}{3 \times 3}$

$= \frac{2}{3} \times \frac{3}{3}$

$= \frac{2}{3} \times 1 = \frac{2}{3}$

I hope it helped you

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2 years ago

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3. If 3, x, y, 18, are in arithmetic progression, (A, P) find the value of x and y

Luba_88 [7]

Answer:

Below in bold

Step-by-step explanation:

The sequence is:

3, x, y, 18

If this is an A P then

x - 3 = y - x

2x - y = 3 (A) and

y - x = 18 - y

2y - x = 18 (B)

Multiply (A) by 2:

4x - 2y = 6 (C)

Adding B and C:

3x = 24

x = 8.

and

2y - 8 = 18

2y = 26

y = 13.

So x = 8 and y = 13.

b) ar + ar^2 = 6ar^3 where a = first term and r = common ratio

Divide by a:

r + r^2 = 6r^3

6r^3 - r^2 - r = 0

r(6r^2 - r - 1) = 0

r(3r + 1)(2r - 1) = 0

So the 2 possible values of r

= -1/3 and 1/2.

i) The common ratio is positive so it must be 1/2.

Second term ar = 8

1/2 a = 8

a = 16.

So the first 6 terms are:

16, 8, 4, 2, 1, 1/2.

5 0

2 years ago

What is an equation of the line that passes through the points (3,4) and (-4, -3)?

azamat

Answer:

y=x+1

Step-by-step explanation:

1) Find the slope

m=-3-4/-4-3

m=-7/-7

m=1

2) Use y=mx+c

by using the point (3,4)

4=1(3)+c

4=3+c

c=1

3) The answer

y=x+1

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2 years ago

Express as a sum: a-5 m-n Express as a difference: 7+3 a+5 a+b

NeTakaya

Answer:

Step-by-step explanation:

a-5 = -5+a

m-n = m + (-n)

7+3 = 7 - ( -3)

a+5 = a - (- 5)

a+b = a - (-b)

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3 years ago

Find the quotient: –37.44 ÷ 4.8 Check reasonableness by estimating: –37.44 4.8 Estimated quotient:

Brrunno [24]

Answer:

Step-by-step explanation:

The most important part of this question is the estimation. That means you round either up or down to get whole numbers.

You can make - 37.44 either - 40 or - 35

You can make 4.8 into 5

So the answer should lie between -40/5 = - 8

The answer should be between - 35/5 = - 7

Use your calculator to check it.

-37.44 ÷ 4.8 = - 7.8

This skill is very handy when shopping or writing a test. It you get an outrageous answer like - 21.44 you know you have done something wrong.

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3 years ago

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