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3 years ago

Molly and Nancy disagree about the value of the expression 2+3×4. Molly thinks it is 20 and Nancy thinks it is 14.how could

2 answers:

6 0

Molly- 2+3 equals 5 then she times that by 4 which gets 20 but Nancy used PEMDAS and did 4x3 then added 2 which gets 14. Nancy is correct

kvasek [131]3 years ago

4 0

Molly : she calculated 2 + 3 x 4.....and she got 20......so she basically added 2 + 3 (which equals 5), then multiplied by 4...giving her 20.

Nancy : she calculated 2 + 3 x 4...and she got 14...so she basically multiplied the 3 x 4 (which is 12) and added the 2.

Nancy is correct because in PEMDAS (the order of operations) multiplication comes before addition

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Please help!! (Number 73)

Rasek [7]

So hmm notice the picture below

one is 7x5x1.75 the volume of a rectangular prism is V = length * width * height

so 7*5*1.75 gives us 61.25 ft³

the second one, is larger by some width and length we dunno, but we know that it required that 61.25 plus an extra 17.5 to fill it up, so its volume is 61.25 + 17.5 or 78.75

the height is the same... so $\bf V=l\cdot w\cdot h\qquad 
\begin{cases}
l=length\\
w=width\\
h=height\\ --------\\
h=1.75\\
V=78.75
\end{cases}\implies 78.75=lw\cdot 1.75
\\\\\\
\cfrac{78.75}{1.75}=lw\implies 45=lw$

so.. if you factor 45, to two factors, one will be the length, the other the width

3 0

3 years ago

Different problem same topic please help

BlackZzzverrR [31]

Answer:

see below

Step-by-step explanation:

y = 5x - 31

y = mx + b

where m = slope

slope of a parallel line = 5

slope of a perpendicular line = - 1/5

7 0

3 years ago

How do you get the answer to 4x+10=-26

s2008m [1.1K]

4x = -36 Subtract 10 from both sides
x = -9 Divide by 4 on both sides

6 0

3 years ago

Read 2 more answers

The cost of a pound of nails increased from $2.17 to $2.52. What is the percent of increase to the nearest whole-number perce

Cloud [144]

Answer:

16% is the percent of increase to the nearest whole-number percent.

Step-by-step explanation:

As the cost of a pound of nails increased from $2.17 to $2.52.

$2.52 - $2.17 = $0.35

so dividing the 0.35 by 2.17 would give us the percetange of increase

0.35/2.17 = 0.16 which is 16%.

Therefore, 16% is the percent of increase to the nearest whole-number percent.

7 0

3 years ago

I need a step by step I got lost in learning

alexandr402 [8]

Answer:

6 to the power of 2.

Step-by-step explanation:

Recall that whenever you divide exponents with the same base, you subtract the powers, but the base will still be the same. Therefore, 6 to the power of 12 divided by 6 to the power of 10 is 6 to the power of 2. Subtract the powers (exponents) or 12 minus 10, and you get 2. Since the base doesn't change, it is still 6. The solution to this expression is 6 to the power of 2. Hope this helps!

8 0

3 years ago