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
boyakko [2]
4 years ago
11

Manny was given the equation (x+2)(x-17)=0 and asked to find the zeros. The solutions he came up with were x=2 and x=-17. Are hi

s solutions correct? Justify your answer.
Mathematics
1 answer:
lutik1710 [3]4 years ago
8 0

Answer:

  no

Step-by-step explanation:

Neither "solution" satisfies the equation.

For x=2,

  (2 +2)(2 -17) = 4(-15) = -60 ≠ 0

For x=-17

  (-17+2)(-17-17) = (-15)(-34) = 510 ≠ 0

_____

Solutions are values of x that make the factors 0.

  x + 2 = 0 . . . first factor = 0

  x = -2 . . . . . . subtract 2 from both sides of the equation

  x -17 = 0 . . . . second factor = 0

  x = 17 . . . . . . .add 17 to both sides of the equation

Appropriate solutions are x = -2 and x = 17.

You might be interested in
Given f(x) = x^2 – 3x – 2, what is f(5)?
miskamm [114]

Answer:

f(5)=8

Step-by-step explanation:

Given function: f(x)=x^2-3x-2

To find f(5), simply input x=5 into the function:

\begin{aligned}\implies f(5) & =5^2-3(5)-2\\& = 25-15-2\\& = 10-2\\& = 8\end{aligned}

5 0
2 years ago
Read 2 more answers
Write 3.16 as a mixed number in lowest terms
Yakvenalex [24]
3.16=3 { \frac {16}{100} }== \gt mixed\ number \\ \ \ \ \ \ \ \ \ =3 { \frac {\ 4\ }{\ 25\ } } == \gt lowest\ term
3 0
3 years ago
Read 2 more answers
If you cycled for 3 hours and travelled 54 km calculate your average speed​
goldenfox [79]

Answer:

162 km per hour

Step-by-step explanation:

Hi!

Speed=Distance x Time

So... 3 x 54 = 162

Hope this helps :)

3 0
3 years ago
Read 2 more answers
Which inequality has the solution set shown on the graph?
professor190 [17]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Al saves pennies. He agreed to give 3/7 of his pennies to Bev if she would give 3/7 of what she got from Al to Carl and if Carl
ser-zykov [4K]

Answer:

2744 pennies.

Step-by-step explanation:

Let x represent the number of pennies Al have initially.

We have been given that Al agreed to give 3/7 of his pennies to Bev, so number of pennies Bev will get would be \frac{3}{7}x.

We are also told that Bev gave 3/7 of what she got from Al to Carl, so number of pennies that Carl will get would be \frac{3}{7}x\cdot \frac{3}{7}=\frac{9}{49}x.

Further, Carl gave 3/7 of what he got from Bev to Dani, so number of pennies that Dani will get would be \frac{9}{49}x\cdot \frac{3}{7}=\frac{27}{343}x.

We are also told that Dani received 216 pennies. Now, we will equate 216 to \frac{27}{343}x and solve for x as shown below:

\frac{27x}{343}=216

\frac{27x}{343}*343=216*343

27x=74088

\frac{27x}{27}=\frac{74088}{27}

x=2744

Therefore, Al have 2744 pennies initially.

3 0
3 years ago
Other questions:
  • What is the measure of QPR
    13·1 answer
  • What's the equation?
    5·1 answer
  • The daily rainfall during a two week period in April was: 1, 0.5, 0.3, 0, 0, 0, 1.1, 0.7, 2, 1.3, 2 inches. What was the median
    5·2 answers
  • Hello! Can anyone please tell me the measurement of t and v ? Any help is gladly appreciated.​
    15·1 answer
  • Valerie saves 70% of the money she earns from gardening. How much will she save from a job that
    15·1 answer
  • Help me with this pls​
    5·1 answer
  • Find x pls help me this is due soon
    9·1 answer
  • Hey, can u help, answer right please. NO LINKS!
    12·2 answers
  • (2.40) (9.6.2)
    5·2 answers
  • What is the area of the following figure?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!