3 years ago

One number exceeds another by 20 . The sum of the numbers is 78. What are the numbers

Mathematics

1 answer:

castortr0y [4]3 years ago

4 0

Answer: 2 numbers are 19 and 39

Step-by-step explanation:

y = x + 20

Equation: x + y + 20 = 78

⇔ x + y = 78 - 20

⇔ x + y = 58

⇔ y = 58 - x

So, we have:

x + 20 = 58 - x ( = y)

⇔ x + x = 58 - 20

⇔ 2x = 38

⇔ x = 19

⇒ y = x + 20 = 19 + 20 = 39

You might be interested in

Someone please help i’m desperate to pass this quiz

slavikrds [6]

Answer:

y=2x+5

Step-by-step explanation:

8 0

2 years ago

8k = 0 A.)8 B.)16 C.)0 D.)4

Sergio039 [100]

Answer:

Step-by-step explanation:

Anything divided by 0 is equal to 0.

7 0

2 years ago

Read 2 more answers

A motorboat travels 60 km in 4 hours with the current and 35 km in 3.5 hours against the current. Find the speed of the boat in

IceJOKER [234]

Step-by-step explanation:

Distance = rate × time

If b is the speed of the boat in still water, and c is the speed of the current, then:

60 = (b + c) × 4

35 = (b − c) × 3.5

Simplifying:

15 = b + c

10 = b − c

Add the equations together:

25 = 2b

b = 12.5

Plug into either equation to find c:

c = 2.5

The speed of the boat is 12.5 km/h, and the speed of the current is 2.5 km/h.

8 0

2 years ago

Read 2 more answers

I'm BEGGING FOR HELP WITH THIS

Dmitrij [34]

Answer:

add 15 to both sides

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

The length of a parking lot is 5 yards more than the width. If the area of the parking lot is 104 square yards, find the dimensi

Artist 52 [7]

Area= L x W and if the L is 5 yds more than the width is the equation with be...
Area(104)=Wx(W+5)
so 104=W^2+5w
w^2+5W-104 using the quadratic formula you end up getting
W=8
L=8+5=13
13*8=104

6 0

3 years ago