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iVinArrow [24]
3 years ago
6

421.2 - 305.8 Using mental math

Mathematics
1 answer:
Nitella [24]3 years ago
8 0

Answer:

114.4

Step-by-step explanation:

421.2

-305.2

114.4

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Which expressions are equivalent to the one below?
den301095 [7]
The expressions that show different ways to rewrite
\dfrac{16^{x}}{4^{x}}

are ...
  a. (4^x * 4^x) / 4^x
  b. 4^x
  c. (16 / 4)^x
8 0
2 years ago
BRAINLIEST WILL BE PICKED!
Snowcat [4.5K]
My other answer was was lacking (I also believe I should have furthermore edited it.), therefore I will attempt to explain the steps correctly this time. I don't know what exactly is requested nor what you are learning, but I suspect it would be combinations, factorials, and/or permutations, something along those lines. Firstly I figured out my answer using factorials. 

FROM: F,R,O,M. This obtains 4 letters.

4! (1 x 2 x 3 x 4)= 24 

I am unsure if this is what you are looking for though. I hope this helped a bit.

6 0
3 years ago
Someone please explain how this in general form 2x – 3y – 7 = 0 is 2x - 3y + 10 = 0​
Korvikt [17]

Answer:

Step-by-step explanation:

yes....the pair of linear equations has unique solution.....

2x + 3y - 7 = 0 ...... (i)

3x + 2y + 10 = 0 ....... (ii)

on comparing the equation i nd ii with a1x + b1y + c1 = 0

nd a2x + b2y + c2 = 0 reslectively......

a1 = 2 ; b1 = 3 ; c1 = -7

a2 = 3 ; b2 = 2 ; c2 = 10

here....its clear that......

a1 / a2 is not equal to b1 / b2

Therefore the given pair of linear equation have a unique solution........

7 0
2 years ago
Plz help guys! I will mark everyone who answers correctly for each one! Plz!
ryzh [129]

Answer:

Let's say that x is sam's age and y is Amy's age

x=y-4

and five years ago:

x-5=(y-5)/2

y-4-5=(y-5)/2

2y-18=y-5

y=13

x=9

then:

sam's age is 9 and Amy's age is 13

5 0
2 years ago
Read 2 more answers
What is the 5th equivalent fraction to <br> 1<br> 8<br> ?
valkas [14]

Answer:

5/40

Step-by-step explanation:

1/8 = 2/16 = 3/24 = 4/32 = 5/40

you just need to add 1 to the numerator(number on top) and 8 to the denominator(number at bottom). :)

7 0
2 years ago
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