1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Citrus2011 [14]
3 years ago
8

Hoang has worked as a nurse at Springfield General Hospital for 7 years longer than her friend Bill. Two years ago, she had been

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
3 0

Answer:

Bill\to 9\ years

H \to 16\ years

Step-by-step explanation:

Let

H \to Hoang

B \to Bill

Currently:

H = B + 7

Two years ago

H - 2 = 2 * (B -2)

Required

H and B

We have:

H - 2 = 2 * (B -2)

Open bracket

H -2 =2B - 4

Add 2 to both sides

H -2+2 =2B - 4+2

H =2B -2

Substitute H = B + 7

B + 7 =2B -2

Collect like terms

2B - B =7+2

B = 9

Substitute B = 9 in H = B + 7

H = B + 7

H = 9 + 7

H = 16

You might be interested in
Alfie sells flooring for playgrounds.
dexar [7]

area of playground= 9×15= 135m^2

area of lawn= 3×4=12m^2

total flooring area= 135-12= 123m^2

cost=36×123=$4428

6 0
3 years ago
A motorboat maintained a constant speed of 15 miles per hour related to water going 44 miles upstream then returning the total t
yanalaym [24]

The speed of the current is 13 mph

<h3>What is speed?</h3>

speed refers to distance travelled per unit time. This is a vector quantity this implies that it has magnitude and direction.

The unit for speed as used here is miles per hour and can be written in short form as mph

<u>Given data</u>

speed of boat = 15 miles per hour = 15 mph

distance = 44 miles upstream

total time for the trip = 7.5 hours

<h3>solving for the speed of the current</h3>

let the water current be x

speed = distance / time

the total travel time upstream and downstream is known

for upstream

15 - x = 44 / time

time = 44 / 15 - x

for downstream

15 + x = 44 / time

time = 44 / 15 + x

total time = time for upstream + time for downstream = 7.5

7.5 = (44 / 15 - x ) + ( 44 / 15 + x )

7.5 = ( 44 ( 15 + x ) + 44 ( 15 - x ) ) / ( 15 + x  )( 15 - x )

7.5 ( 15 + x  )( 15 - x ) = 210 +44x + 210 - 44x

7.5 ( 225 - x ^ 2 ) = 420

( 225 - x ^ 2 ) = 56

169 = x ^ 2

x = sqrt ( 169 )

x = 13 miles per hour

hence speed of current is 13 miles per hour

Read more on speed here: brainly.com/question/4931057

#SPJ1

3 0
1 year ago
Darla is able to drive her car 37.5 miles per gallon of gasoline. Write the
kupik [55]
3.2 gallons
You see what you do is you divide 120 by 37.5 and you will get the number of gallons
5 0
2 years ago
I attached the picture of the problem I need solved fast ​
Mademuasel [1]
The answer to the equation is 5 7/15
4 0
3 years ago
Read 2 more answers
Solve
grin007 [14]
Answer would be a (-1, ten-thirds) :)
8 0
3 years ago
Other questions:
  • Your little sister has made up a card game where different types of cards are worth different points. Face cards are worth 12 po
    15·1 answer
  • Please help me I need this done not a lot of work but please get it done with good credit for good rating and reward!
    5·1 answer
  • Which statements about opposites are true?
    8·1 answer
  • Please help, thank you.
    9·1 answer
  • The scale on a model of a frog is 2 cm = 25 mm. Find the actual length
    5·1 answer
  • What is the value of KL
    9·1 answer
  • What is the solution set for -4X –10 &lt; 2?<br> A X &lt;-3<br> B x&gt;-3<br> C X&lt;2<br> DX&gt; 2
    6·2 answers
  • The table compares actual lengths in a room to lengths in a blueprint of the room.
    13·1 answer
  • Where should the value of the square root of 37 (37) be placed on a number line?
    13·1 answer
  • 6
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!