Answer:
x=2
Step-by-step explanation:
-3x+7=1
subtract 7 from both sides: -3x+7-7=1-7
simplify: -3x=-6
divide both sides by -3: 
simplify: x=2
Answer:Antonio had a head start of 3 meters
Step-by-step explanation:I took the test
Answer:
20
Step-by-step explanation:
locate 10 on the horizontal (x- axis), go vertically up to meet the line at (10, 20)
The corresponding output is the value on the vertical (y- axis )
That is the output is 20
Answer:
1mm, 1cm, 1m, 1km.
Step-by-step explanation:
(27⁽⁻ˣ⁺³⁾) (9⁽ˣ⁺¹⁾) = 81
Instead of using logarithmic to find x, Notice that 27, 9 and 81 are the perfect powers of 3. Since 27 = 3³, 9 = 3², and 81 = 3⁴, so
(3³⁽⁻ˣ⁺³⁾) (3²⁽ˣ⁺¹⁾) = 3⁴
3³⁽⁻ˣ⁺³⁾⁺²⁽ˣ⁺¹⁾ = 3⁴
If the bases are the same, then cancel it and bring the power as a new base.
3(-x+3) + 2(x+1) = 4
-3x + 9 + 2x + 2 = 4
-x + 11 = 4
-x = 4 - 11
-x = -7
x = 7
