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Fantom [35]
3 years ago
11

Evaluate the expression. 12 + 3 • 8

Mathematics
2 answers:
Olenka [21]3 years ago
5 0

Answer:

36

Step-by-step explanation:

3*8=24

24+12= 36

Gnesinka [82]3 years ago
5 0

Answer:

36

Step-by-step explanation:

When evaluating an expression, you must take PEMDAS into account. PEMDAS stands for:

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

You follow these steps, for example, in this expression we don't have any parenthesis or exponents, leaving us to do multiplication first instead of addition:

12 + 24

Now, all you have to do is add these two together:

36

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qaws [65]

Answer:

obtuse triangle

Step-by-step explanation:

8 0
3 years ago
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Which solid has a greater volume? O A. Figure A 48 B. Figure B O C. they are equal A 2 O D. need more information​
MatroZZZ [7]

9514 1404 393

Answer:

  B.  Figure B

Step-by-step explanation:

The figure is difficult to read. We assume the height of the pyramid is 9, and the radius of the cylinder is 1.

The pyramid volume is ...

  V = 1/3Bh

  V = 1/3(4²)(9) = 48 . . . cubic units

__

The cylinder volume is ...

  V = πr²h

  V = π(1²)(48) = 48π . . . cubic units

The cylinder has π times as much volume as the pyramid. Figure B is larger.

_____

<em>Additional comment</em>

If the diameter (not the radius) of the cylinder is 1 unit, then its volume is 12π cubic units and the pyramid has more volume.

7 0
3 years ago
At the beginning of an experiment, the temperature of a solution was 48°C. During a 6-hour
ExtremeBDS [4]

9514 1404 393

Answer:

  • -2.2(6) +1.8(4) . . . temperature change
  • 42 °C

Step-by-step explanation:

At the end of the first 6 hours, the temperature change was ...

  (-2.2 K/h)(6 h) = -13.2 K

The change in the next 4 hours was ...

  (1.8 K/h)(4 h) = 7.2 K

Then the total change over the 10-hour period was ...

  (-2.2)(6) +(1.8)(4) . . . . . expression for temperature change

This evaluates to -13.2 +7.2 = -6.

__

The final temperature is the sum of the initial temperature and the temperature change:

  final temperature = 48 °C -6 °C = 42 °C

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<em>Additional comment</em>

When temperature is measured on the Celsius scale, a change of 1 degree is called a kelvin (K).

8 0
3 years ago
Lupe can ride her bike at a rate of 20 mph when there is no wind. On one particular day, she rode 2 miles against the wind and n
lana [24]
Let wind speed = x mph 

when she rode 2 miles against the wind we have:-
speed = distance / time so
20 - x  = 2 / t -------(1)      where t is the time she took.

when riding with the wind we have 

20 + x = 3 / t--------(2)   adding equations (1) and (2):-

40  =  2/t + 3/t
40 =  5/t
t = 5/40 = 1/8 hr 

x = 20 - 2 / 1/8  = 20 - 16 = 4

Wind speed was 4 mph Answer

4 0
3 years ago
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(10x-4)/5=20 Solve for x write your answer in decimal form
zepelin [54]

Answer:

Step-by-step explanation:

(10x-4)/5=20

decimal is x= 10.4

7 0
2 years ago
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