I hope this helps you
5×(3-2)=5×1=5
or
5×3+5×(-2)=15+(-10)=15-10=5
Answer:
B. y = 2.5
Step-by-step explanation:
Diane's average speed= 25/y km/h.
Ed's speed= (25/y) - 6 km/h.
Ed walks 25-3 = 22 km.
Consider Ed's journey:
Speed = distance / time so:
(25/y) - 6 = 22 / (y + 3) ( 3 hours longer = y + 3)
(25 /y - 6)(y + 3) = 22
25 + 75/y - 6y - 18 = 22
6y - 75/y = 25 - 18 - 22
6y - 75/y + 15 = 0
6y^2 + 15y - 75 = 0
2y^2 + 5y - 25 = 0
(2y - 5 )(y + 5) = 0
y = 2.5, -5.
y = 2.5 ( as it must be positive.
Step-by-step explanation:
2x^2+7x-3=0
by doing splitting the middle term we get/ <u>using quadratic eq we get-</u>
Let's solve your equation step-by-step.
2x2+7x−3=0
For this equation: a=2, b=7, c=-3
2x2+7x+−3=0
Step 1: Use quadratic formula with a=2, b=7, c=-3.
x=
−b±√b2−4ac
2a
x=
−(7)±√(7)2−4(2)(−3)
2(2)
x=
−7±√73
/4
x=
−7
4
+
1
4
√73 or x=
−7
4
+
−1
4
√73
Answer:
x=
−7
4
+
1
4
√73 or x=
−7
4
+
−1
4
√73
please mark me as the brainliest:)
Hello :
<span>(4y-3)²=72
4y-3 = </span>√72 or 4y-3 = - √72
y= (3+√72) /4 or y= (3 - √72) /4
