<span>{4x + y = 2
{−2x + y = 5
--------------------subtract
6x = -3
x = -1/2
</span>4x + y = 2
4(-1/2) + y = 2
-2 + y = 2
y = 4
x = -1/2 and y = 4
answer
<span>(−1/2, 4)</span>
Answer:
He will need a 94 to get an 82 average
Step-by-step explanation:
82 x 7 =574
80 x 6 = 480
574-480 = 94
Answer:
15.21= 15.2 when rounded
Step-by-step explanation:
the formula for finding the area of a circle with the diameter is
A= 1/4 × π ×d^2
9514 1404 393
Answer:
- 42 students; (28 students); 70 students
- (60%); 40%; (100%)
Step-by-step explanation:
The percentages total 100%, so the missing percentage is
100% - 60% = 40%
The numbers on the number lines are proportional, so now you can write ...
?/100% = 28/40% . . . . . . ? total students
Multiplying by 100% gives ...
? = 28/0.4 = 70 . . . . . total students
Then the 60% portion of students can be found two ways:
60% × 70 = 42 students . . . . 60% of students
70 -28 = 42 students
