Ok so we have 2 equations here...
x + y = 76
1/3x + 1/2y = 34
First solve for x in the 1st equation...
x + y = 76
x = 76 - y
Now substitute 76-y for x in the 2nd equation...
1/3x + 1/2y = 34
1/3(76-y) + 1/2y = 34
76/3 - 1/3y + 1/2y = 34
-1/3y + 1/2y = 34 - 76/3
-2/6y + 3/6y = 34 - 25 1/3
1/6y = 8 2/3
y = 8 2/3 ÷ 1/6
y = 8 2/3 × 6
y = 52
Now substitute 52 into the 1st equation for y
x + y = 76
x + 52 = 76
x = 76 - 52
x = 24
The 2 numbers are 24 and 52.
The difference between the numbers is
52 - 24 = 28
Answer:
126 $
Step-by-step explanation:
1- 18000 / 100 = 180
2- 180 x 0.7 = 126$
Answer:
The first option.
Explanation:
Since these numbers are given in scientific notation, we must first look at the exponent to determine whether or not it's big or small. Negative exponents are less, so we start with that. Immediately, that eliminates the second and third options as -8 is less than -6 and 3. The last two numbers given in the first and last options, however, both have 3 as the exponent. Now, we look at the number given in front. 2.5 is less than 7, so we know that the first option is in order from least to greatest.