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
vodka [1.7K]
3 years ago
11

Tommy was trying to solve the system of a linear equation and a quadratic equation shown below. 2x – y = –1 x2 – 5x – y = –7 Tom

my had completed the following steps in his algebraic solution process but could not factor the resulting quadratic, x2 – 7x – 1, to complete the problem. Step I: y = 2x + 1 Step II: x2 – 5x – (2x + 1) = –7 Step III: x2 – 5x – 2x – 1 = –7 Step IV: x2 – 7x – 1 = –7 Determine the step in which Tommy made his mistake and justify your reasoning.
Mathematics
1 answer:
drek231 [11]3 years ago
4 0

Answer:

Step IV; Tommy must set the quadratic expression equal to 0 before factoring.

plz give brainlyest

You might be interested in
A yellow hot-air balloon is 100 feet off the ground and rising at rate of 8 feet per second.An orange hot-air balloon is 160 fee
Serhud [2]

ANSWER

Find out the how long will the Yellow balloon be higher than the orange balloon.

To proof

Now  the diagram is given below

As given

A yellow hot-air balloon is 100 feet off the ground and rising at rate of 8 feet per second.

i.e height of the yellow baloon off the ground  = 100 feet

rising at rate = 8 feet per second.

.An orange hot-air balloon is 160 feet off the ground and rising at a rate of 5 feet per second.

i.e height of the orange baloon off the ground  = 160 feet

rising at rate = 5feet per second.

Formula

Relative\ velocity = \frac{Relative\ Distance}{Relative\ time}

Relative velocity =  rising rate of yellow balloon -   rising rate of orange balloon

= 8 -5

= 3 feet per second

Relative distance =  height of the yellow baloon off the ground -  height of the orange baloon off the ground

= 160 -100

= 60 feet

put in the formula

= \frac{60}{3}

= 20 second

after  20 second Yellow balloon will be higher than the orange balloon.

Hence proved

8 0
3 years ago
If you enter the formula =A2*(1+$A$1) in cell B2 and then copy cell B2 to C2, the numerical result in cell
denis-greek [22]
It’s is b 121 . Gang gang
6 0
3 years ago
What is 2 2/15 - 1 2/3=<br> I ended up with 2 3/21 <br> Really need help with this!
QveST [7]

Answer:

2 \frac{2}{15}  - 1 \frac{2}{3}

=  \frac{32}{15}  -  \frac{5}{3}

=  \frac{32 \times 1 - 5 \times 5}{15}

= \frac{32 - 25}{15}

=  \frac{7}{15}

5 0
3 years ago
A bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. One marble is chosen at random. What is the probability that
algol13
1/3 because there's 4 blue marbles in a bag of 12 marbles so as a fraction that would be 4/12 cancelled down = 1/3
3 0
3 years ago
Identify at least one Hamilton path and at least one Hamilton circuit
Anna71 [15]

We will investigate how to determine Hamilton paths and circuits

Hamilton path: A path that connect each vertex/point once without repetition of a point/vertex. However, the starting and ending point/vertex can be different.

Hamilton circuit: A path that connect each vertex/point once without repetition of a point/vertex. However, the starting and ending point/vertex must be the same!

As the starting point we can choose any of the points. We will choose point ( F ) and trace a path as follows:

F\to D\to E\to C\to A\to B\to F

The above path covers all the vertices/points with the starting and ending point/vertex to be ( F ). Such a path is called a Hamilton circuit per definition.

We will choose a different point now. Lets choose ( E ) as our starting point and trace the path as follows:

E\to D\to F\to B\to A->C

The above path covers all the vertices/points with the starting and ending point/vertex are different with be ( E ) and ( C ), respectively. Such a path is called a Hamilton path per definition.

One more thing to note is that all Hamilton circuits can be converted into a Hamilton path like follows:

F\to D\to E\to C\to A\to B

The above path is a hamilton path that can be formed from the Hamilton circuit example.

But its not necessary for all Hamilton paths to form a Hamilton circuit! Unfortunately, this is not the case in the network given. Every point is in a closed loop i.e there is no loose end/vertex that is not connected by any other vertex.

4 0
1 year ago
Other questions:
  • Someone please tell me
    10·1 answer
  • How can you determine if two ratios are equal or equivalent?
    13·1 answer
  • you lease a car valued at 23,495 for 3 years at $429.95/month with a $500 down payment. If interest is 30% of the payment, how m
    13·2 answers
  • Simplify 2x + x<br> a) 2x^2<br> b) 3x<br> c) 3x^2
    8·2 answers
  • I need these numbers Least to greatest
    13·1 answer
  • 20/256 Simplified. I need this answer. Will give brainliest
    6·2 answers
  • What is the slope of the line that passes through (3, 3) and (-2, -3).
    12·2 answers
  • Find the volume of the triangular prism​
    10·1 answer
  • Here’s the pic help please answer I’ll give brainliest !! It’s for a test
    13·1 answer
  • HELPP ME PLEASE!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!