All categories

3 years ago

Peter says, "If you subtract 19 from my number and multiply the difference by -3, the result is

Mathematics

1 answer:

Likurg_2 [28]3 years ago

4 0

Answer:

Step-by-step explanation:

Let the peter's number be represented x

Given that

1. if you subtract 19 from my number

writing it mathematically it will be x -19

2. multiply the difference by -3

it can be written as

since difference is x-19

multiplied the difference with -3

-3(x-19)

3. the result is -21

-3(x-19) = -21

dividing both side by -3

-3(x-19)/-3 = -21/-3

x-19 = 7

adding 19 both sides

x-19 + 19 = 7 + 19

x = 26

Thus, peter's number is 26.

You might be interested in

Use a table to find a z-score that fits the given conditions. Interpolate if necessary.

kotegsom [21]

After deeply looking at the table it seems
z= .05
which means only 52% is less than Z

so, that is greater than z by 48%

7 0

3 years ago

A food cooperative is a business that usually offers special prices on locally grown food and produce. Some are clubs and some a

Hoochie [10]

Answer:

The indifference point is 8 weeks.

Step-by-step explanation:

First, we establish the total cost formula for each:

x= number of weeks

Club:

Total cost= 20 + 15*x

Retail:

Total cost= 17.5*x

Now, we equal both formulas and isolate x:

20 + 15x = 17.5x

20 = 2.5x

8=x

The indifference point is 8 weeks.

Prove:

Total cost= 20 + 15*8= $140

Total cost= 17.5*8= $140

3 0

3 years ago

Material for a dress costs £5.50 per metre. find the cost of 10cm and 70cm

Zielflug [23.3K]

Answer:

The cost of 10 cm and 70 cm are £0.55 and £3.85 respectively.

Step-by-step explanation:

Material for a dress costs £5.50 per meter.

We know that, 1 meter = 100 cm.

Suppose, the cost of 10 cm material is $x$ and the cost of 70 cm material is $y$

Now, according to the ratio of "cost" to the "length of material" , we will get.......

$\frac{x}{10} =\frac{5.50}{100}\\ \\ 100x=10*5.50=55\\ \\ x=\frac{55}{100}=0.55$

and

$\frac{y}{70} =\frac{5.50}{100}\\ \\ 100y=70*5.50=385\\ \\ x=\frac{385}{100}=3.85$

So, the cost of 10 cm material is £0.55 and the cost of 70 cm material is £3.85

5 0

3 years ago

a rabbit's fur grows at a rate of 5/2 per month. How many months will it take for the rabbit's fur to grow 15/4 inches

UkoKoshka [18]

The answer is 1.5 months

explanation:

5/2 = 2.5

15/4 = 3.75

2.5 per month

3.75 per x months

x = (3.75×1)/2.5

x = 3.75/2.5

x = 3/2 = 1.5 months

3 0

3 years ago

Alejandra correctly wrote the equation y – 3 = 1/5 (x – 10) to represent a line that her teacher sketched. The teacher then chan

Nataly [62]

(-3,-10).....slope(m) = 2

y - y1 = m(x - x1)
y - 3 = 2(x - 10)

8 0

3 years ago