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alisha [4.7K]
3 years ago
13

Can someone explain and help me with this?

Mathematics
1 answer:
vovangra [49]3 years ago
4 0

Answer:

A) a²-2a+2a-4 the a is correct check my explanation to understand the answer.

Step-by-step explanation:

(a+2)(a-2)= a²-2a+2a-4

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Work out the sheet below
rewona [7]

Answer:

188 meters cubed

Step-by-step explanation:

  1. radius = 1/2d d=6 radius =3 height 20
  2. formula for thia equation is 1/3 (3.14)(3^2)(20)
  3. (3.14)(9)(20)
  4. 3.14 x 9 = 28.26
  5. 28.26 x 20 = 565.2
  6. 565.2/3 = 188.40
  7. 188.4 round to 3sf is 188

5 0
2 years ago
What is 2/5 of a book to 1/2 of an hour as a unit rate?
hjlf

Answer: 4/5 book per hour

Step-by-step explanation:                                                                        in this question, we are to rewrite (2/5)/(1/2) as unit rate.

To write this as a unit rate, what we need to do  is to divide 2/5 by 1/2.

That means 2/5 divided by 1/2

Removing the division and replacing with multiplication will give 2/5 * 2/1 = 4/5 books/hour

6 0
3 years ago
Help me guys thank you
ELEN [110]

well it a obtuse angle so 160 degree

7 0
3 years ago
If −6 + 10 = 17, then what is 3 − 5?
Novay_Z [31]
-6 + 10 = 4
but you say the answer is 17?

okay, so let's assume you add 13 to the final answer

3 - 5 = -2
-2 + 13 = 11

This question doesn't make sense
6 0
4 years ago
Evaluate the following expressions by substituting s = 5 and t = 4.
s344n2d4d5 [400]

\huge\text{Hey there!}

\huge\textbf{Equation:}

\mathbf{4t^2 - 2t - s}

\huge\textbf{Solving:}

\mathbf{4t^2 - 2t - s}

\mathbf{= 4(4)^2 -  2(4) - 5}

\mathbf{= 4(4\times 4) - 2(4) - 5}

\mathbf{= 4(16) - 2(4) - 5}

\mathbf{= 64 - 2(4) - 5}

\mathbf{= 64 - 8 - 5}

\mathbf{= 56 - 5}

\mathbf{= 51}

\huge\textbf{Answer:}

\huge\boxed{\textsf{Option B. 51}}\huge\checkmark

\huge\text{Good luck on your assignment \& enjoy your day!}

<h3>~\frak{Amphitrite1040:)}</h3>

4 0
2 years ago
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