Answer:
Solve for y in the second equation
Step-by-step explanation:
We assume your system is ...
Dividing <em>the </em><em>second equation</em> by 3 gives ...
-3x +y = 1
so an expression for y without fractions can be found by <em>solving for y</em>, that is, by adding 3x:
y = 3x +1
_____
<em>Comment on alternate solution</em>
We'd be tempted to solve the first equation for -9x and substitute for that.
-9x = 10 -4y
(10 -4y) +3y = 3 . . . . . substitute for -9x
-y = -7 . . . . . . . . . . . . . simplify, subtract 10
y = 7 . . . . . . . . . . . . . . multiply by -1
$4.30
Do ten times $3.57 and subtract it from $40
You would earn $34 in total because 3x3 equals 9. And 12+5+7=24. 9+24÷35
The three subtraction sentences 12-4=8, 8-4=4, and 4-4=0 can be expressed as a single division sentence. The division sentence 12/4 = 3 means that, starting with the number 12, 4 can be subtracted 3 times to get zero.
Division is repeated subtraction 12 / 4 means how many 4's you can subtract from 12. 12 orange split into units of 4, then how many kids can get 4 oranges 12 - 4 = 8 1st kid 8 -4 = 4 2nd kid 4 - 4 = 0 3rd kid So 3 kid can get 4 oranges each. If we multiply 3 * 4 =12 if each 3 kids get each 4 oranges , then what was the total oranges distributed among kids Now we say that Multiplication is repeated addition. 4 * 3 = 12, 4 + 4 + 4 = 12 Further we can say that Multiplication and division is opposite of each other Like 2 * 3 = 6 6/3 = 2 6/ 2 =3 , Also division and fractions are the same, and symbols can be used interchangeably.
Answer:
658.24 m
Step-by-step explanation:
The figure makes a triangle with vertices abc.
Where ab = 500 m
bc = 350 m
The angle abc = 100°
Using the cosine rule we can find the distance ac.
ac² = 500²+350² - 2×500×350×cos100°
= 372,500 - -60,776.86
= 433,276.86
ac = √433,276.86
= 658.24 m
