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2 years ago

How can you multiply positive and negative fractions?

Mathematics

1 answer:

Ivan2 years ago

7 0

Step-by-step explanation:

When you multiply a fraction by another fraction or a fraction by a whole number, the rules of fractions dictate the form of the answer. If at least one of the values is negative, you also use the rules for positive and negative signs to determine if the result is positive or negative.

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3х2+9х+6 Foil method of

IgorLugansk [536]

Answer:

3(4+3x)

Step-by-step explanation:

See Image below.

7 0

3 years ago

A county government says that a safe level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

Schach [20]

Answer:

Part A : |x-2.5| ≤ 0.75 , x ∈ [1.75,3.5]

Part B : yes, the lifeguard should add more chlorine.

Step-by-step explanation:

Part A:

Let C is the variation of the level of chlorine in a hot tub.

Level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

To find absolute value inequality, need to find the standard level of chlorine 1.75 + C or 3.25 - C

1.75 + C = 3.25 - C

2C = 5

C = 2.5

So, the standard level would be 2.5 ppm,

If x represents the present level of chlorine,

Then it would be lie within 1.75 ppm of 3.25 ppm.

1.75 ≤ x ≤ 3.25

Subtract 2.5 from all sides

1.75 - 2.5 ≤ x -2.5 ≤ 3.25 - 2.5

-0.75 ≤ (x-2.5) ≤ 0.75

which is equivalent to the following absolute value inequality.

|x-2.5| ≤ 0.75

And the solve of the inequality : x ∈ [1.75,3.5]

Part B: If x = 1.0 ppm,

∴ |1.0-2.5| = 1.5 which is not less than equal to 0.75.

Another explanation:

the minimum safe level of chlorine in a hot tub is 1.75 ppm

Since 1 < 1.75

Therefore, lifeguard should add more chlorine.

8 0

3 years ago

(2, -5) and (7, -5) in slope intercept form

Natasha2012 [34]

The slope-intercept form of a line is:

y=mx+b, where m=slope and b=y-intercept

First find the slope, which is the change in y divided by the change in x, mathematically:

m=(y2-y1)/(x2-x1), where (x1,y1) and (x2,y2) are any two points...

m=(-5--5)/(7-2)

m=0/5

m=0, so this line has zero slope, thus it is a horizontal line of the form:

y=k, where k is the constant value of y, in this case y=-5 so

y=-5

6 0

3 years ago

A can of fruit contains 3 1/2 cups of fruit. The suggested sourcing sizes is 1/2 cup. How many servings are in the can of fruit?

vovangra [49]

Answer:

7 servings of fruit.

Step-by-step explanation:

To find out how many servings are contained in the can, we need to divide the total can of fruit by a serving.

3.5/.5=7.

There are 7 servings of fruit in the can.

Hope this helps!

6 0

3 years ago

Read 2 more answers

Task number 3 on this attachment is what i need help with

Anni [7]

So $49.95+$1.19(384)+(384/18)($3.89) = $589.896
Idk if you need to round your answer.

4 0

3 years ago