R^2 + 4r = 0 please show work

Answers

Answer 1

Answer: ${ r }^( 2 )+4r=0\n \n r\left( r+4 \right) =0\n \n \therefore \quad r=0\quad \wedge \quad r=-4$

Answer 2

Answer: $r^2 + 4r = 0\nr(r+4)=0\nr=0 \vee r=-4$

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write an equation to determine the area of each rectangle , then find the area. 1. 19 ft 11 ft 2. 18.3 cm 5.9 cm 3. 5.27 m 10 m

Answers

1. 19×11=209 cm^2 2. 18.3×5.9=107.97 ft^2 3. 5.27×10= 52.7 m^2 Area= length times width

How to solve 7-(4/5×1/3)

Answers

First, calculate the ones that is in the bracket, 4/5×1/3 = 4/15 (make the denominator the same), second finish the question, 7 - 4/15.
Answer, 6&11/15. (six and eleven over fifteen.

What is the answer to 68.20 ÷ 3.1

Answers

63.2/3.1=
632/31=
20.
The answer is 20

What are the missing y values in the table

Answers

Answer:

0.) Y= -5

-1.) Y= +3

Step-by-step explanation:

y=-5 x=3 have a great day

Calvin and Mike do sit-ups when they work out. They start with 64 sit-ups for the first set and do half as many each subsequent set. A. What representation can you use to show the relationship between the set number and the number of sit-ups?

Answers

To represent the relationship between the set number and the number of sit-ups, you can use a simple verbal description: "The number of sit-ups in each set is half of the number in the previous set". The relationship between the set number and the number of sit-ups can be represented as a geometric sequence, where each set has half the number of sit-ups as the previous set. This can be calculated using the formula for a geometric sequence.

To represent the relationship between the set number and the number of sit-ups that Calvin and Mike do, you can use a mathematical expression or formula. In this case, the number of sit-ups in each set decreases by half compared to the previous set. You can express this relationship using an exponential decay formula:

$S_(n) = S_(1) . ((1)/(2)) ^(1-n)$

Where:

$S_(n)$ represents the number of sit-ups in the nth set.

$S_(1)$ is the initial number of sit-ups in the first set (which is 64 in this case).

$(1)/(2)$ represents the reduction factor, as each subsequent set has half as many sit-ups.

n is the set number.

Using this formula, you can easily calculate the number of sit-ups in any set. For example, to find the number of sit-ups in the 4th set (n = 4), you would substitute n = 4 into the formula:

$S_(4) = 64 . ((1)/(2)) ^(4-1) = 64.((1)/(2)) ^(3) = 64 .(1)/(8) =8$

So, in the 4th set, Calvin and Mike do 8 sit-ups. This formula allows you to determine the number of sit-ups for any set without manually calculating each time.

Learn more about Geometric Sequence here:

brainly.com/question/33243139

#SPJ3

Answer:

64/2=32 32/2=16 16/2=8 8/2=4 4/2=2 2/2=1

Step-by-step explanation:

if you were to use a in and out chart you can you can set the in as the starting amount (64) and make the out/formula ÷2

beyonce michelle and kelly shared a carton of soft drink containing 2 dozen cans. Beyonce takes 3/8 Michelle takes 5/12 and kelly takes 5./24/ How many cans does each person receive?

Answers

Beyonce gets 9 cans worth, Michelle drinks 10 cans worth of soft drink and kelly receives 5 cans worth.

Dozen = 12 so 2 dozens = 12x2=24

3/8 = 9/24 because 8x3=24 & 3x3=9
5/12 =10/24 because 12x2=24 & 5x2=10
5/24 is fine because it is already out of 24

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