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icang [17]
3 years ago
15

What Expressions are equivalent to x-(-x)+y

Mathematics
1 answer:
ycow [4]3 years ago
5 0

Answer:

2x+y

Step-by-step explanation:

x-(-x)+y the subtraction sign and negative x cancel and makes the x positive

x+x=y

2x+y

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A scientist has a sample of bacteria that initially contains 10 million microbes. They observe the sample and finds that the num
sergiy2304 [10]

Answer:

M(t) = 6.7 * 10⁷ (67 million)

Minutes (t) =55

Step-by-step explanation:

1. Write an exponential equation that represents M, the total number of bacterial microbes in millions, as a function of t, the number of minutes the sample has been observed.

For answering this question, we will use the following formula:

M(t) = B₀ * g ^(t/m), where:

•M(t) represents the total number of bacterial microbes in millions.

• B₀ represents the initial population of bacteria in millions.

• g represents the growth factor.

• t represents the total number of minutes we will observe the bacteria growing.

• m represents the time in minutes it takes to the growth factor g to occur.

2. Then, determine how much time, to the nearest minute, will pass until there are 67 million bacterial microbes.

M(t) = B₀ * g ^(t/m)

Replacing with the values we know:

6.7 * 10⁷ = 10⁷ * 2 ^(t/20)

6.7 = 2 ^(t/20) (Dividing by 10⁷ at both sides)

ln 6.7 = ln 2 ^(t/20)

ln 6.7 = t/20 ln 2

ln 6.7/ ln 2 = t/20

t = ln 6.7/ln 2 * 20

t = 2.74 * 20

t = 54.88

t ≅ 55 (rounding to the nearest minute)

3 0
2 years ago
Look at this graph:
Lorico [155]
Y = 30/20x + 20
( i haven’t done this in a while but i’m pretty sure this is right)
4 0
2 years ago
Read 2 more answers
A rectangle has a length that is 5 inches more than the width Its perimeter is 50 inches. Find the length
Crazy boy [7]

Answer:

Length is 30 width is 20

Step-by-step explanation:

50 divided 2 is 25. Add 5 to 25. Then you have two parts. 30 and 20.

They are your answers.

4 0
3 years ago
A number decreased by 0.37 times the number is 12.6 Find that number.
Semenov [28]

Answer:

Answer below, however this question is worded weirdly

Step-by-step explanation:

x(x - 0.37 ) = 12.6

simplify the equation

x^2 - 0.37x = 12.6

x^2 - 0.37x - 12.6 = 0

3 0
3 years ago
I'm not quite sure how to get the area of this parallelogram. ​
DENIUS [597]

Answer:A=224

Step-by-step explanation:

A=bh

A=Area B=Base H=Height

A=16*14

7 0
3 years ago
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