Ask question

Ask question

All categories

2 years ago

4

Write two subtraction equations to show how to find 15-7?

2 answers:

blondinia [14]2 years ago

7 0

Well just do 15-7 subtract 7 and you get 8

larisa [96]2 years ago

3 0

Answer:

The required two subtraction equation is (10 - 5) + (5 - 2)

Step-by-step explanation:

Consider the provided information,

We need to write two subtraction equations to show how to find 15-7

First consider the number 15

The number 15 can be written as:

15 = 10 + 5

The number 7 can be written as:

7 = 5 + 2

Now substitute the respective values in original expression.

(10 + 5) - (5 + 2)

Open the parentheses

10 + 5 - 5 - 2

Now rearrange them as shown below:

10 - 5 + 5 - 2

Close in parentheses.

(10 - 5) + (5 - 2)

Thus, the required two subtraction equation is (10 - 5) + (5 - 2)

You might be interested in

A credit card issuer charges an APR of 13.99%, and its billing cycle is 30 days long. What is its periodic interest rate?

gavmur [86]

A credit card issuer charges an APR of 13.99%, and its billing cycle is 30 days long its periodic interest rate would be 1.15%. The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query about and it will be able to help you, and if you’d like, feel free to ask another question.

8 0

2 years ago

Read 2 more answers

An artist is creating a sculpture using bendable metal rods of equal length. One rod is formed into the shape of a square and an

Alika [10]

Check the picture below.

so notice, their perimeter is the same, because the perimeter is just one rod anyway, and all rods are the same length, thus

$\bf P_s=P_t\implies 4s=3(s+2)\implies 4s=3s+6\implies s=6$

6 0

2 years ago

Read 2 more answers

Carolina is mowing lawns for a summer job. For every mowing job, she charges an initial fee plus \$6$6dollar sign, 6 for each ho

Margarita [4]

For this case, the first thing we must do is define variables.

We have then:

t: number of hours

F (t): total charge

We write the function that models the problem:

$F (t) = 6t + b$

Where,

b: represents an initial fee.

We must find the value of b.

For this, we use the following data:

Her total fee for a 4-hour job, for instance, is $ 32.

We have then:

$32 = 6 (4) + b$

From here, we clear the value of b:

$32 = 24 + b$

$32-24 = b$

$b = 8$

Then, the function that models the problem is:

$F (t) = 6t + 8$

Answer:

the function's formula is:

$F (t) = 6t + 8$

7 0

2 years ago

You research the average cost of whole milk for several recent years to look for trends. The table shows your data. What is the

Rashid [163]

The <em>correct answers</em> are:

y = 0.10x + 2.50; $5.

Explanation:

Using a graphing calculator, we enter the data in the STAT function. The year will be the independent (x) variable and the cost will be the dependent (y) variable.

For the year, instead of starting at 1998, we will start at 0, since that is where we started measuring. This means the year 2000 will be 2; 2002 will be 4; etc, up to x=10.

Running the linear regression, the calculator gives us a slope of 0.10 and a y-intercept of 2.499, or 2.50. This makes the equation y = 0.10x + 2.50.

To predict the price in 2023, we first find what our x-value will be. Subtract 1998 from this:

2023-1998 = 25

Now substitute 25 in place of x in the equation:

y = 0.10(25) + 2.50 = 2.50 + 2.50 = 5

5 0

2 years ago

One of the tallest buildings in a country is topped by a high antenna. The angle of elevation from the position of a surveyor on

irina1246 [14]

Answer:

a. distance of the surveyor to the base of the building = 2051.90 ft

b. height of the building = 1384 ft

c. Angle of elevation from the surveyor to the top of the antenna = 38.31°

d. Height of antenna = 237.08 ft

Step-by-step explanation:

The picture above is a illustration of the described event.

a = the height of the flag

b = the height of the building

c = distance of the surveyor from the base of the building

the angle of elevation from the position of the surveyor on the ground to the top of the building = 34°

distance from her position to the top of the building = 2475 ft

distance from her position to the top of the flag = 2615 ft

(a) How far away from the base of the building is the surveyor located?

using the SOHCAHTOA principle

cos 34° = c/2475

c = 0.8290375726 × 2475

c = 2051.8679921

c = 2051.90 ft

(b) How tall is the building

The height of the building = b

sin 34° = opposite /hypotenuse

0.5591929035 = b/2475

b = 0.5591929035 × 2475

b = 1384.0024361

b = 1384.00 ft

(c) What is the angle of elevation from the surveyor to the top of the antenna?

let the angle = ∅

cos ∅ = adjacent/hypotenuse

cos ∅ = 2051.90/2615

cos ∅ = 0.784665392

∅ = cos-1 0.784665392

∅ = 38.310258303

∅ = 38.31°

(d) How tall is the antenna?

height of the antenna = a

sin 38.31° = opposite/hypotenuse

sin 38.31° = (a + b)/2615

sin 38.31° × 2615 = (a + b)

(a + b) = 0.6199159917 × 2615

(a + b) = 1621.0803182

(a + b) = 1621. 08 ft

Height of antenna = 1621. 08 - 1384.00 = 237.08031822 ft

Height of antenna = 237.08 ft

8 0

2 years ago