X/7 - 4 =-2 <br>or<br>x divided by 7 minus 4 equals negative 2

I need help with #21

maksim [4K]

Answer: x=9

Step-by-step explanation:

(5x+7)

5 x 9 = 45

45 + 7 = 52

7 0

4 years ago

An account had an initial deposit made and then interest was applied once a year at a fixed rate. The amount of money, in dollar

Cerrena [4.2K]

The equation says
A=p(1+r)^t
A=103(1+0.02)^t
So the interest rate is
0.02*100=2%

8 0

3 years ago

Please explain (will also give brainliest if you put all the steps)

MrMuchimi

Answer:

A = 139.5 cm^2

Step-by-step explanation:

Ok, let's break it down into pieces. First let's find the area of the main rectangle. We know that the area of a rectangle is as follows:

A = L x W

A = 9 x 12

A = 108 cm^2

Now we need to find the area of the two triangles. There are two ways to approach this. If you can visualize that you can flip the first triangle and slide it against the second, it becomes a rectangle. Then you can simply use the same formula as before with modified numbers.

L = 7 (height of the triangle

W = 4.5 (base of the triangle (half of 9))

A (both triangles) = 7 x 4.5

A (both triangles) = 31.5 cm^2

If you can't quite figure out how to visualize that, you can simply treat them as two independent right triangles. The formula for the area of a right triangle is as follows:

A = (1/2)b x h

b = 4.5

h = 7

A (first triangle) = (1/2)4.5 x 7

A (first triangle) = 15.75 cm^2

The area of the second triangle is identical

A (second triangle) = 15.75 cm^2

The area of the two triangles added together is

A (both triangles) = A (first triangle) + A (second triangle)

A (both triangles) = 31.5 cm^2

As you can see we got the same answer both ways. Now we just have to add the area of the two triangles to the area of the rectangle

A = 108 + 31.5

A = 139.5 cm^2

3 0

3 years ago

Read 2 more answers

How many dots are there at t minutes? Solve the problems by your preferred method. Your

Zielflug [23.3K]

<h2>Answer:</h2>

The image to the question is missing, but I found a matching image, which is attached to this solution

Answer:

3 minutes = 13 dots

100 minutes = 401 dots

t minutes = 4(t) + 1 dots

Step-by-step explanation:

From the image, the following can be noticed:

time (Mins) dots

0 1

1 5

2 9

The pattern gotten from this progression is that, if the time is multiplied by 4, and the result added to one, the result will be the number of dots.

hence, when the time is 0 minutes:

0 × 4 = 0

0 + 1 = 1 ( 1 dot)

when the time is 1 minute

1 × 4 = 4

4 + 1 = 5 (5 dots)

when the time is 2 minutes

2 × 4 = 8

8 + 1 = 9 ( 9 dots)

Therefore,

when the time = 3 minutes

3 × 4 = 12

12 + 1 = 13 dots

at 100 minutes:

100 × 4 = 400

400 + 1 = 401 dots

at t miutes

t × 4 = 4t

4t + 1 = number of dots

Therefore number of dots at t minutes = 4(t) + 1

3 0

3 years ago

Monique opens a savings account with $500. the simple interest rate is 4%, calculated annually. how much money will she have in

liraira [26]

500 times 0.04 (4%) to find out how much she will earn in a year

500 times 0.04 is 20

Thus, she will earn 20 per year

now 20 times 30 years is 600.

Finally 600 + 500 is 1100. which means she would have 1100 dollars after 30 years

6 0

3 years ago

Read 2 more answers

X/7 - 4 =-2 orx divided by 7 minus 4 equals negative 2