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3 years ago

Solve these questions for 18 points (Solving Integers)

Mathematics

1 answer:

notsponge [240]3 years ago

8 0

Answer:

x >= 9

x <= 32

x > -24

x > -5

x <= 10

x > -6

Step-by-step explanation:

first, write it down as inequalities:

5x >= 45

x/4 <= 8

x/-3 < 8

7x > -35

x/2 <= 5

3x > -18

then, solve the inequalities

5x >= 45

x >= 45/5

x >= 9

x/4 <= 8

x <= 8*4

x <= 32

x/-3 < 8

x > 8 * -3

x > -24

7x > -35

x > -35/7

x > -5

x/2 <= 5

x <= 5*2

x <= 10

3x > -18

x > -18/3

x > -6

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Melanie spent four hours babysitting. She charges $16 up front and then an additional charge per hour. The total amount she earn

Sergeu [11.5K]

Answer:

She earns $4 x is representing the hours.

Step-by-step explanation:

16 is the charge up front.

I can infer that the additional charge is $4 because x represents the hours because we don't know how many hours she's going to spend there.

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3 years ago

-2x - y = -9<br><br>5x -2y = 18<br>Solve as a whole number

nexus9112 [7]

Answer:

x = 4, y = 1

(4, 1)

Step-by-step explanation:

-2x - y = -9

5x -2y = 18

-2x - y = -9

+2x +2x

-y = 2x - 9

/-1 /-1

y = -2x + 9

5x -2y = 18

5x - 2(-2x + 9) = 18

5x + 4x - 18 = 18

9x - 18 = 18

+ 18 + 18

9x = 36

/9 /9

x = 4

Now, we solve for y:

-2(4) - y = -9

-8 - y = -9

+ 8 +8

-y = -1

/-1 /-1

y = 1

(x, y) -> (4, 1)

Hope this helps!

6 0

3 years ago

How do you write twice the sum of seven and a number

scZoUnD [109]

Answer:

2 (7 + n)

Step-by-step explanation:

2 (7 + n)

For this equation you need to put parenthesis to show that you need to add, then multiply.

Hope this helps! :)

5 0

3 years ago

Read 2 more answers

Jim offers 15% off on a gallon of ice cream that costs $4.36. Which of the following will make Jeff's offer a better deal?

Mashcka [7]

The price after the discount is $3.706

<h3>Discount price</h3>

Give the following parameters

cost of ice cream = $4.36
Percent-off coupon = 15%

Discount = 0.15 * 4.36

Discount = $0.654

Price after the discount = $4.36 - 0.654

Price after the discount = $3.706

Hence the price after the discount is $3.706

Learn more on discount here: brainly.com/question/24304697

4 0

3 years ago

In a survey of some farmers of a community, 70% of them are found cultivating rice, 60% cultivating wheat, 20% are not cultivati

yan [13]

Answer + Step-by-step explanation:

let R be the set of farmers cultivating rice.

let W be the set of farmers cultivating wheat.

let n be the total number of farmers.

i) Check the attachment.

ii) Card R∪W = Card R + Card W - Card R∩W

Note : Card R denotes the number of farmers cultivating rice.

$CardR\cup W=n-\frac{20}{100} n = \frac{80}{100} n$

$CardR=\frac{70}{100} n$

$CardW=\frac{60}{100}n$

$CardR \cap W=450$

Card R∪W = Card R + Card W - Card R∩W

$\Longleftrightarrow \frac{80}{100} n=\frac{70}{100} n + \frac{60}{100} n-450$

$\Longleftrightarrow \frac{50}{100} n=450$

$\Longleftrightarrow n= 2 \times 450 = 900$

iiI) the number of farmers who are cultivating rice only :

$900\times \frac{70}{100} -450=180$

6 0

2 years ago