Answer:
<h3>(5y-3)/2</h3>
Step-by-step explanation:
Given the equation 2x+ 3 / 5= y
Cross multiply
2x+3 = 5 * y
2x+3 = 5y
Subtract 3 from both sides
2x+3-3 = 5y - 3
2x = 5y-3
Divide both sides by 2
2x/2 = (5y-3)/2
x = (5y-3)/2
Hence the value of x is (5y-3)/2
Using the given information, the width of the river is 505.96 m
<h3>Bearing and Distances</h3>
From the question, we are to determine the width of the river
Consider the given diagram,
Let F be the first position of the biker
S be the second position
and C be the position of the church
First, we will determine the distance covered from F to S
Speed = 160m/min
Time = 4 minutes
Using the formula,
Distance = Speed × Time
Distance covered = 160 × 4
Distance covered = 640 m
That is, /FS/ = 640 m
Now, consider ΔFSC
∠F = 90° - 70° = 20°
∠S = 90° + 56° = 146°
and ∠C = 180° - 20° - 146° = 14°
By the Law of Sines

∴ 

/FC/ = 1479.33 m
Now,
By SOH CAH TOA

NOTE: d is the width of the river
∴ d = /FC/ × cos70°
d = 1479.33 × cos70°
d = 505.96 m
Hence, the width of the river is 505.96 m
Learn more on Bearing and distances here: brainly.com/question/19351991
#SPJ1
Answer:
3
Step-by-step explanation:
Answer:
-15 13/15
Step-by-step explanation:
I used a calculator
Answer:
a) 6x³ − 5x² − 39x + 35
b) no
Step-by-step explanation:
(2x − 5) (3x² + 5x − 7)
Distribute:
3x² (2x − 5) + 5x (2x − 5) − 7 (2x − 5)
Distribute again:
6x³ − 15x² + 10x² − 25x − 14x + 35
Combine like terms:
6x³ − 5x² − 39x + 35
5x − 2 is the opposite of 2x − 5, so you would get the negative of the answer from part (a).