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igor_vitrenko [27]
3 years ago
14

• If 7x +5= 2x +9, then x= ?

Mathematics
1 answer:
Oksana_A [137]3 years ago
6 0

Answer:

x=4/5

Step-by-step explanation:

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A storage box is shown. What are the volume and the surface area of this storage chest. Enter your answers in the box’s
Lera25 [3.4K]

Answer:

Step-by-step explanation:

6 0
4 years ago
In 10 years, a bank account with a 5.25% annual interest rate earned $18,375 as simple interest. What was the principal amount?
sdas [7]

Answer:

The principal amont was $35,000

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

In this problem, we have that:

E = 18375, t = 10, I = 0.0525

We want to find P. So

E = P*I*t

18375 = P*0.0525*10

0.525P = 18375

P = \frac{18375}{0.525}

P = 35000

The principal amont was $35,000

5 0
3 years ago
Suppose Sally has 9.94 kilograms of seed. If it takes 7.1 kilograms of seed to plant one hectare of land, how many hectares of l
Andrew [12]

Answer:

9.94 kg seed need 1.4 hectare of land

Step-by-step explanation:

Sally has=9.94kg

1 hectar need=7.1 kg

Now,

9.94kg=(9.94/7.1) hectare

=1.4 hectare

so,9.94 kg =1.4 hectare

6 0
3 years ago
What value of x makes this equation true?<br> 4r - 10 = 18
Bond [772]
X= 7
This is because of you plug in 7 for x into the equation it will give you 28-10 which is 18.
6 0
3 years ago
PLEASE HELP, WILL GIVE BRAINLIST TO BEST ASNWER GOOD EASY POINTS!<br><br> right answers only please
worty [1.4K]

The line of the best fit is y = 2100x -4166040 and the number of bottles is, 86460 which expect to sell in 2025

<h3>What is the line of best fit?</h3>

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

We have data shown in the table:

To find the line of best fit, we will calculate its slope and y-intercept.

We know the slope is given by:

\rm m = \dfrac{n\sum xy-\sum x \sum y}{n \sum x^2 - (\sum x)^2}   where n = 5

After calculating, we get,

\rm n\sum xy-\sum x \sum y = 105000  and

\rm n \sum x^2 - (\sum x)^2 = 50

m = 105000/50 = 2100

For y-intercept b:

\rm b = \dfrac{\sum y -m \sum x}{n}

After calculating:

b = -4166040

The line becomes:

y = 2100x -4166040

If x = 2025 put this value in the line, we get:

y = 86460

Thus, the line of the best fit is y = 2100x -4166040 and the number of bottles is, 86460 which expect to sell in 2025

Learn more about the line of best fit here:

brainly.com/question/14279419

#SPJ1

4 0
2 years ago
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