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
kati45 [8]
3 years ago
8

2. Solve the system of equations using the substitution method.

Mathematics
1 answer:
Dimas [21]3 years ago
7 0

Answer:

x = 1

Step-by-step explanation:

2x + 3y = 20

2x + 3(10-4x) = 20

2x + 30 - 12x = 20

combine like terms

-10x + 30 =  20

        -30      -30

-10x = -10

divide both sides by -10

x = 1

Hope this Helps!!!

You might be interested in
Solve x2 + 7x + x2 + 7x + 9 = 3​
algol13

Answer:

x2 + 7x + x2 + 7x + 9 = 3

6 0
3 years ago
There exist infinitely many common fractions $\frac{a}{b}$ , where $a > 0$ and $b > 0$ and for which $\frac{3}{5} < \fr
vredina [299]

Answer:

3/5 has the smallest denominator

Step-by-step explanation:

Question:

There exist infinitely many common fractions a/b , where a > 0 and b > 0 and for which 3/5 < a/b< 2/3. Of these common fractions, which has the smallest denominator? Express your answer as a common fraction.

Solution

A Common fraction is a rational number written in the form: a/b. Where a and b are both integers.

The denominator and numerator in this case are greater than zero. That is, they are non zeros.

The least common denominator (LCD) of two non- zero denominators is the smallest whole number that is divisible by each of the denominators.

To find the smallest denominator between 3/5 and 2/3, we would convert the fractions to equivalent fractions with a common denominator by finding their LCM (lowest common multiple).

When comparing two fractions with like denominators, the larger fraction is the one with the greater numerator and the smaller fraction is one with the smaller numerator.

In our solution after comparing, the smaller fraction would have the smallest denominator.

Find attached the solution.

3 0
3 years ago
WORTH 100 POINTS!
zzz [600]

Answer:

7miles

equations shown in work image below

work shown on the paper with more explanations because text is hard to write equations (sorry I used km but it is miles for your problem.)

:) please give a heart for thanks

and brainliest crown :)

Step-by-step explanation:

For both d=r*t

Each bikes to others house and leave at the same time so for Tony,

11 = 30*t

t= 11/30 hours

for Gerry,

11 = 25*t

t= 11/25 hours

Comparing these, with LCD,

Tony's time is 55/150

Gerry's time is 66/150

So Tony got to Gerry's house 11/150 hours quicker than Gerry got to Tony's house.

Now they turn around and head back toward each other. If they leave at the same exact time, the elapsed time for each until they met would be the same so t (for tony) = t (for gerry), but Tony got a head start.

We start the stopwatch when Gerry turns around 11/150 hours after Tony has turned around. If Gerry's time to where they meet from Tony's house t(gerry), then Tony's time from Gerry's house is t(gerry) + 11/150

5 0
3 years ago
Read 2 more answers
CAN SOMEONE HELP PLZZZ PLZZ PLZZZZZ ILL GIVE EVERYTHING
Studentka2010 [4]

Answer:

what do u need help with?

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
At the hairdresser, Jenny had 27 centimeters cut off her hair. How many decimeters of hair did Jenny have cut off?
lions [1.4K]
1 centimetre=0.1 decimetre
therefore the answer is 2.5 decimetres.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Find the slope of the line passing through the points (4,8) and (1,6)
    7·2 answers
  • A jar contains 3 black marbles, 4 white marbles and 5 striped marbles. If a marble is picked at random, what is the probability
    7·2 answers
  • Find the range of the relation {(–1, 4), (2, 5), (3, 5)}. Then determine whether the relation is a function.
    7·1 answer
  • PLEASE HELP ME WITH THIS I WILL GIVE BRAINLIEST
    7·1 answer
  • 1, 3, 9, 27, ... What's the pattern rule and the next three numbers?​
    9·2 answers
  • Elena wants to make a scale drawing of her bedroom using the scale 4cm to 1m. If Wall A in the drawing is 10 cm long, what is th
    8·1 answer
  • Please help me!!<br> I need to get this question
    13·1 answer
  • If 9999 = 4, 8888 = 8, 1816 = 6, 1212 = 0, then 1919 =?
    9·1 answer
  • A tow truck company in Houston charges a $40 service call fee and an additional fee of $15 per mile that the vehicle is towed. W
    12·1 answer
  • Monique bought a shirt for $22.80 during a 30% off sale. How much does the shirt cost when it is not on sale?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!