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MaRussiya [10]
3 years ago
14

Help me pls asap

Mathematics
1 answer:
Sveta_85 [38]3 years ago
3 0

Answer: B

Step-by-step explanation:

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Joe, working alone, takes 8 hours to mow a lawn. Sally, working alone, can mow the same lawn in 6 hours. How long does it take t
tamaranim1 [39]

Answer: 3 3/7 hours

Step-by-step explanation:

you need to find out how much work they can do in an hour.

let x represent the total collaborative work

1/8 + 1/6 = 1/x

3/24 + 4/24 = 1/x

7x = 24

x = 24/7 or 3 3/7 hours (in decimal form this is 3.4286)

I cannot guarantee this is correct but hope it helped

6 0
3 years ago
Why is the letter i the square root of negative one ( <img src="https://tex.z-dn.net/?f=%5Csqrt%7B-1%7D" id="TexFormula1" title=
Alja [10]

Answer:

It is an imaginary number.

Step-by-step explanation:

The square root of negative one is "i," the imaginary number. This concept is immensely useful in mathematics, as it allows for there to be square roots of negative numbers, which is otherwise not possible using only real numbers.

Any number that includes a negative square root is called an imaginary number. For example, the square root of -9 equals 3i, an imaginary number. When an imaginary number and a real number are combined, for example 2 + 3i, this is called a complex number. Complex numbers have many real world applications, including manipulating sound waves and calculating electrical currents.

3 0
3 years ago
Which shows all the names that apply to the figure?
saul85 [17]
The answer is A


A Parallelogram is a shape with 4 sides that has two pairs of parallel sides. The opposite sides must have equal length.  This is accurate for this shape.

A Rectangle is a shape with 4 sides that has four right angles.  This is accurate for this shape.

A rhombus is a shape with 4 sides of equal length.  This is not accurate for this shape.

A square is a shape with 4 sides of equal length and four right angles.  This is not accurate for this shape.
4 0
3 years ago
What is the lowest common denominator of 5 and 9
lozanna [386]
It is 45 . Just simply multiply both numbers. You will get the smallest denominator
6 0
3 years ago
A ball is dropped from a certain height. The function below represents the height f(n), in feet, to which the ball bounces at th
Fittoniya [83]

We are given a function of the bouncing of the ball expressed as f(n) = 9(0.7)n in which n is an integer as the number of times the ball has dropped. 9 represents the initial height of the ball and 0.7 is the percent of which the height is reserved
4 0
4 years ago
Read 2 more answers
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