MATHEMATICS HIGH SCHOOL

HELP ME PLZZ I NEED HELLPPP!!!!!1

Answers

Answer 1

Answer:

Answer:

-225 feet

Step-by-step explanation:

The submarine started at -40 feet and wend down 185 feet which means the submarine is now at -225 feet.

Work:

-40 + (-185)

-40-185

-225

Final Answer: -225 feet

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Simplity. (2+7) / (7/2 x 2)

Answers

Answer: 9/7 or 1.28571 or 1 2/7

Three ways to simplify :)

Step-by-step explanation:

Use PEMDAS to help simplify

(2+7) becomes 9

(7/2 x 2) becomes 7

Simplified, it's 9/7, which is equivalent to 1.28571

The Canadian $2 coin has a copper centre surrounded by a ring of nickel. The diameter of the coin is 2.8 cm. The area of the copper centre is 2.0 cm2 . What is the area of the nickel ring

Answers

Answer:

6.0 cm²

Step-by-step explanation:

Area of the coin:

$A_c = d\pi\n\nA_c = 2.8\pi\approx8.8\ cm^2$

So area of the ring:

A = 8.8 - 2.0 = 6.0 cm²

Answer:

4.15

Step-by-step explanation:

d = 2.8cm, a = 1.4cm

a = πr2

a = 3.14 * 1.42

a = 3.14 * 1.96

a = 6.15cm2

6.15 - 2 = 4.15

The area of the nickel ring is 6.15cm2

What is 62 in expanded form? a. 36 b. 12 c. 6 × 6 d. 2 × 2 × 2 × 2 × 2 × 2

Answers

The answer is C. 6X6

imagine that the number 2 button on your calculator is damaged and cannot be used.use a flow chart to show 3 different ways in which you can calculate 24x12

Answers

$\left\begin{array}{ccc}24=3\cdot8\n12=3\cdot4\end{array}\right\}24\cdot12=3\cdot8\cdot3\cdot4\n\n\n\left\begin{array}{ccc}24=144:6\n12=36:3\end{array}\right\}24\cdot12=144:6\cdot36:6\n\n\n\left\begin{array}{ccc}24=96:4\n12=48:4\end{array}\right\}24\cdot12=96:4\cdot48:4\n\n\n\left\begin{array}{ccc}24=16+8\n12=9+3\end{array}\right\}24\cdot12=(16+8)\cdot(9+3)\nsequence\ of\ key:16+18=M+;\ 9+3=* MR=\n\n\n$

when (2x - 3)^2 is subtracted from 5x^2, what is the result? And how can I show the answer? Thank you x

Answers

5x^2 - (2x - 3)^2 =
5x^2 - ((2x - 3)(2x - 3)) =
5x^2 - (4x^2 - 6x - 6x + 9) =
5x^2 - (4x^2 - 12x + 9) =
5x^2 - 4x^2 + 12x - 9 =
x^2 + 12x - 9 <===

first expand (2x-3)^2
(2x-3)(2x-3)=(2x-3)(2x)+(2x-3)(-3)=4x²-6x-6x+9=4x²-12x+9

so
5x²-(4x²-12x+9)=5x²-4x²+12x-9=x²+12x-9

Why is it a good idea to check to see if your answer is reasonable?a. if your answer is reasonable, you have probably done the problem correctly
c. you just need to solve for the variable
b. if you understand the problem, you will not need to check your answer
d. to get the correct answer, you will need to draw a picture
Mark this and return

Answers

Answer:

Option: a is the correct answer.

a. if your answer is reasonable, you have probably done the problem correctly.

Step-by-step explanation:

Checking for reasonableness is a process by which students evaluate estimations to see if they are reasonable guesses for a problem.

So, a good idea to check to see if your answer is reasonable is:

a. if your answer is reasonable, you have probably done the problem correctly.

( Since a reasonable answer is just a estimation of the problem it can't be claimed to be true but it is just a probable estimation ).

It is a good idea to check to see if your answer is reasonable because a. if your answer is reasonable, you have probably done the problem correctly.