3 years ago

Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!

Mathematics

1 answer:

olya-2409 [2.1K]3 years ago

7 0

Answer:

260

Step-by-step explanation:

speed of plane= p

speed of wind =w

(p+w)*3=840
p+w=840/3=280

and

(p-w)*3.5=840
p-w= 840/3.5= 240

added up the 2 equations we get:

2p= 280+240
p=260 mph

then

w= 20 mph

You might be interested in

Whether the 3x+ 2y= 4 and -2x + 3y = 1 are parallel perpendicular, or neither?

Vikki [24]

Answer:

Perpendicular

Step-by-step explanation:

3 0

4 years ago

A line intersects the points (-2,5) and (6,5) What is the slope-intercept equation for the slope

avanturin [10]

Answer:

Step-by-step explanation:

(y2-y1)/(x2-x1)

8 0

3 years ago

Which of the following ordered pairs represents the solution to the system given below? 2x + y = 20 4x − 2y = 40 A) (10,0) B) (0

shtirl [24]

$2x+y=20 \ \ \ |\times 2 \\
4x-2y=40 \\ \\
4x+2y=40 \\
\underline{4x-2y=40} \\
4x+4x=40+40 \\
8x=80 \ \ \ |\div 8 \\
x=10 \\ \\
2x+y=20 \\
2 \times 10+y=20 \\
20+y=20 \ \ \ |-20 \\
y=0 \\ \\
\boxed{(x,y)=(10,0)} \Leftarrow \hbox{answer A}$

4 0

3 years ago

Read 2 more answers

2n - 3 = 9 what does this equal

hoa [83]

Step-by-step explanation:

2n-3=9

Adding 3 to both sides, we get

2n-3+3=9+3
2n=12

Dividing both sides by 2, we get

2n/2=12/2
n=6

5 0

3 years ago

Read 2 more answers

At a fabric store, fabrics are sold by the yard. A dressmaker spent $36.35 on 4.25 yards of

Orlov [11]

Answer:

Step-by-step explanation:

yokjjnkjbhygvj

4 0

3 years ago

Read 2 more answers