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3 years ago

What is the first step in simplifying the expression?

1 answer:

7 0

(9 - 7 X 3 + 4 )²
Always follow the rule
BIDMAS

Brackets
Indices
Division
Multiplication
Addition
Subtraction

First look at the Brackets
There are no indices in the brackets
There is no division in the brackets
There is a Multiplication in the brackets    7 x 3

For the answer
(9 - 7 x 3 + 4)²
Brackets
Multiplication   7 x 3 = 21
(9 - 21 + 4)²
Addition   -21 + 4 = -17
(9 - 17)²
Subtraction    9 - 17 = -8
-8²

Now start again once the brackets are gone
-8²
Indices
-8 x -8 = 64

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The temperature was 78°F at 3 P.M. Each hour for

polet [3.4K]

Answer:

66 °F

Step-by-step explanation:

At 4 P.M., the temperature had decreased by 3° from the temperature at 3 P.M., so was ...

4 P.M. temp = 78 °F -3° = 75 °F

This was repeated until 7 P.M.

5 P.M. temp = 75 °F -3° = 72 °F

6 P.M. temp = 72 °F -3° = 69 °F

7 P.M. temp = 69 °F -3° = 66 °F

The temperature at 7 P.M. was 66 °F.

Of course the repeated subtraction can be simplified using multiplication. The subtraction of 3° four times is equivalent to the subtraction of . . .

(3°)(4) = 12°

That is, the temperature at 7 P.M. is ...

78 °F -3°×4 = 78 °F -12° = 66 °F

6 0

2 years ago

-2,-1,0,1 whichave pair of numbers has a sum of zero

Verizon [17]

-1+1=0. So your answer is -1 and 1

3 0

2 years ago

40 POINTS!!!! ANSWER CORRECTLY PLZ

Grace [21]

Answer:

5. ○ $\displaystyle \frac{25}{48}$

4. ○ $\displaystyle \frac{25}{46}$

3. ○ $\displaystyle \frac{31}{100}$

2. ○ $\displaystyle \frac{3}{4}$

1. ○ $\displaystyle \frac{27}{50}$

Step-by-step explanation:

5. $\displaystyle \frac{25}{23 + 25} = \frac{25}{48}$

4. $\displaystyle \frac{25}{46} = \frac{25}{21 + 25}$

3. $\displaystyle Flat-out\:given\:to\:you$

2. $\displaystyle \frac{21 + 23 + 31}{100} = \frac{75}{100} = \frac{3}{4}$

1. $\displaystyle \frac{31 + 23}{100} = \frac{54}{100} = \frac{27}{50}$

I am joyous to assist you anytime.

7 0

3 years ago

What is this can someone help

koban [17]

⏫

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see this attachment ☝

6 0

3 years ago

Which shapes are congruent?<br> (See attachment)

Andre45 [30]

Hello! Congruent figures are those with the same size and shape. With that being said, if you look at the shapes correctly, here are your answers:

Quad 1 & 2: Not Congruent
Quad 1 & 3: Congruent
Quad 1 & 4: Congruent
Quad 2 & 3: Not Congruent
Quad 2 & 4: Not Congruent
Quad 3 & 4: Congruent

3 0

3 years ago

Read 2 more answers