Answer:
Step-by-step explanation:
Question One
Multiply through by 2
2*1/2 * (2x + y ) = 21/2 * 2
Combine
2x + y = 21
Subtract 2x from both sides
y = 21 - 2x
Now equate the two given equations
y = 21 - 2x
y = 2x
Add 2x to both sides
2x = 21 - 2x
2x + 2x = 21
4x = 21
x = 21/4
x = 5 1/4
or
x = 5.25
Question 2
multiply numerator and denominator of the second fraction by (x + 2)
Remove the numerator brackets in the right hand fraction. Look out for the minus sign.
Written in standard form, y decreased by 25 = 10 is y - 25 = 10
Now let's solve:
y - 25 = 10
y = 10 + 25
y = 35
to check:
35 - 25 = 10
so, y equals 35
Answer: 
Step-by-step explanation:
-7+5 times -1+9
−7+5×−1+9
-7-5+9
−7−5+9
-12+9
−12+9
−3
Answer:
A
Step-by-step explanation:
Well first find the proportion of the sector of the major Arc(shaded area) and then Multiply by area of the circle πr²
Answer:
4.008, 4.08, 4.6, 4.6072
Step-by-step explanation:
since they all have the same single digit number, next we go to tenths, then hundreths, then thousandths if neccessary.
I hope this helps u pls give a brainliest and a thx ;)
