X+x²=30
x²+x-30=0
(x+6)(x-5)=0
x=-6 or x=5
Answer:
x = 4
y = 3
Step-by-step explanation:
<u>Given </u><u>equations </u><u>:</u><u>-</u>
<u>Second</u><u> </u><u>equation</u><u> </u><u>can </u><u>be</u><u> written</u><u> as</u><u> </u><u>,</u><u> </u>
<u>Adding</u><u> </u><u>them </u><u>:</u><u>-</u><u> </u>
- -3y + 2y = 2 -5
- -y = -3
- y = 3
<u>Put </u><u>this </u><u>in </u><u>(</u><u>ii)</u><u> </u><u>:</u><u>-</u><u> </u>
- x = 3y - 5
- x = 3*3 - 5
- x = 9 -5
- X = 4
Answer:
3x=11
Step-by-step explanation:
a number: x
three times x: 3x
is equal to 11: 3x=11
Answer:
a.
b.
Step-by-step explanation:
a. A number decreased by 11 is at most 14.
b. Ten less than five times a number is less than four times the number decreased by eight.
Using sine formula we have
8/sin60 = x/sin30
hence x= 8/√3 = 4.62