MATHEMATICS MIDDLE SCHOOL

Subtract use model if needed

(9x+5) - (4x+3)=

Answers

Answer 1
Answer: 5x+2 is as simple as I can get.
Answer 2
Answer: 9x-4x+5-3= 5x+2 hope that helps

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Rupert drove home at an average rate of 58 miles per hour. Find his rate in feet per second.

Answers

To find this, you must first multiply 58 by the number of feet in a mile, 5280, to get a total number of feet. This comes out to 306,240 feet per hour. Next, you divide this by 60, since there are 60 minutes per hour, to find the rate of feet per minute, which comes out to 5,104 feet per minute. Finally, you divide this number by 60 again, since there are 60 seconds per minute, to get the final answer of a rate of about 85.0666... feet per second.

A patio in the shape of a semicircle has a diameter of 21 ft. What is the approximate area of the patio, rounded to the nearest square foot? Use 3.14 to approximate pi star times pi.

Answers

The formula of the area of a semi circle is half the area of the circle

( \pi r^2)/(2)

Diameter = 21 ft
Radius = (d)/(2) = (21)/(2) = 10.5 ft

Area = ( \pi (10.5)^2)/(2)
        = (110.25 \pi )/(2)
        =(110.25 * 3.14)/(2)  (3.14 as \pi)
        =(346.185)/(2)
        =173.0925 ft² ≈ 173.1 ft² ≈ 173 ft²
To the nearest square foot : 173 ft²

5.What type of growth has the human population experienced?A. expotential
B. linear
C. logistic
D. logarithmic

Answers

The answer is expotential growth.

What is the scientific notation of 0.0121

Answers

You move to the right, so the exponent is gonna be negative.
1.21 * 10-²

I will pick BRAINLIEST.8. Mr. Jones typed for 10 minutes at a constant rate of 40 words per minute. Mrs. Gonzales typed the same number of words at a constant rate of 50 words per minute. How many minutes did it take Mrs. Gonzales to type the same amount as Mr. Jones? Number the steps in correct order from 1-5 to solve the problem.
____ Set Up: 10(40) = x ∙ 50
____ Identify: Mrs. Gonzales’ time is unknown
____ Check: 10(40) = 8(50)
____ Solve: x = 8
____ Strategize: Let x = Mrs. Gonzales’ time

Answers

Gonzales took 8 minutes to type the same amount that Jones did in 10.  

10x40=400. 400/50=8  

The room is 4 yards. 12/3=4.

Please tell me if im wrong!

Given, f(x)=x²-2x+3, find f(-2)

Answers

Answer:

11

Step-by-step explanation:

(-2)^2-2(-2)+3

(-2)(-2)+4+3

4+4+3

8+3

11
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