bearing in mind that
standard form for a linear equation means
• all coefficients must be integers, no fractions
• only the constant on the right-hand-side
• all variables on the left-hand-side, sorted
• "x" must not have a negative coefficient
8 - 5y = - 2x
2x - 5y = - 8
The scientific notation of the given number is 7.2×
.
<h3>How do you find scientific notation?</h3>
A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.
Given that,
×
×
Taking the common power of 10.
= 
× (2+70)
= 72×
In scientific notation,
Multiply and divide by 10.
7.2×
Hence, The scientific notation of the given number is 7.2× .
To learn more about scientific notation from the given link:
brainly.com/question/27862246
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Answer:
Step-by-step explanation:
Let the number of dimes be d and quarters be q
<u>The value is $8.80 = 880¢, so:</u>
- 10d + 25q = 880 ⇒ 2d + 5q = 176
<u>If the dimes were quarters and the quarters were dimes, the coins' total value would be $7.30 or 730¢</u>
- 25d + 10q = 730 ⇒ 5d + 2q = 146
<u>Now we have 2 equations. Solving the system by elimination, subtract 5 times the second equation from twice the first equation:</u>
- 2(2d + 5q) - 5(5d + 2q) = 2(176) - 5(146)
- 4d - 25d = -378
- -21d = -378
- d = -378/-21
- d = 18
Answer:
2t = 1 / 2
Step-by-step explanation:
2t = 1 / 2
t = 1 / ( 2 x 2 )
t = 1 / 4
