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
Juli2301 [7.4K]
3 years ago
14

A. The sum of Andre and Brandon scores on a math quiz is 180. Andres score is 2 times more than 30 less than Brandon score. Find

each students quiz score.
B. Solve the inequalities.
100x-200>50x-75
Mathematics
1 answer:
pantera1 [17]3 years ago
8 0
A)

a+b=180 and a=2(b-30) using this in the first equation gives you:

2(b-30)+b=180

2b-60+b=180

3b-60=180

3b=240

b=80 so a=100

Andre's score was 100 and Brandon's score was 80.

b)

100x-200>50x-75  subtract 50x from both sides

50x-200>-75  add 200 to both sides

50x>125  divide both sides by 50

x>2.5
You might be interested in
Two fifths miles in one forth hours how fast going<br>​
Leya [2.2K]
10 miles per hour. Since it’s a 1/4 hour you just multiply the 2.5 by four.
8 0
3 years ago
Whats balance fe+30^2 &gt;fe^2O^3
blsea [12.9K]

Answer:

You are given:

4Fe+3O_2 -> 2Fe_2O_3

4:Fe:4

6:O_2:6

You actually have the same number of Fe on both sides, The same is true for O_2 so yes this equation is properly balanced.

For added benefit consider the following equation:

CH_4+O_2-> CO_2+2H_2O

ASK: Is this equation balanced? Quick answer: No

ASK: So how do we know and how do we then balance it?

DO: Count the number of each atom type you have on each side of the equation:

1:C:1

4:H:4

2:O:4

As you can see everything is balanced except for O To balance O we can simply add a coefficient of 2 in front of O_2 on the left side which would result in 4 O atoms:

CH_4+color(red)(2)O_2-> CO_2+2H_2O

1:C:1

4:H:4

4:O:4

Everything is now balanced.

Step-by-step explanation:

5 0
3 years ago
On your last sale of boards, you made 28% and sold them at $40/board. If my cost is the same,
chubhunter [2.5K]
I don’t understand the question, it says “if my cost is the same, what should my new price be”, if your cost is the same… there shouldn’t be a new price.I don’t know if this will help but when im trying to find the answer, i use the butterfly method (part over total times percentage over 100).
3 0
3 years ago
Sue has 4 pieces of wood. the lengths of the wood are 1/3 feet,2/5 feet,3/10 feet and 1/4 feet. which piece of wood is the short
omeli [17]
1/4 foot plank would be the correct answer
8 0
3 years ago
Rectangular Prism<br> Rectangular Pyramid<br> Cylinder<br> Cone<br> ?????
Liono4ka [1.6K]
If it’s rotating around something, it’s most likely a cylinder I believe
3 0
3 years ago
Other questions:
  • Mary mixes white paint and blue paint in the ratio of 2:3 she makes 20 litres of paint.how much more blue paint does she need to
    10·1 answer
  • A searchlight is 6500 feet from a weather station. If the angle of elevation to the spot of light on the clouds above the statio
    12·1 answer
  • Rafael earned a salary of $34,944 last year. How much did he earn a month?
    5·2 answers
  • Aimee has four 100-point projects for her class. Her scores
    6·2 answers
  • Please help me with thisss
    12·2 answers
  • A certain relationship is defined as having only one corresponding y-value for each x-value. Which of the following best describ
    13·1 answer
  • Ayudaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    14·2 answers
  • Determine the Slope for the following ordered pairs:<br> (3,9) (3,21)<br> (5,13) (3,13)
    15·1 answer
  • 4/5 x 3/4 <br><br> please do the steps!!!
    5·2 answers
  • The cost of a cell phone plan includes a service fee and a fee for each minute, t, of all time used. The total cost per month is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!