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
Dmitry_Shevchenko [17]
3 years ago
7

Solve 2x2 + 20x = −38.

Mathematics
1 answer:
cestrela7 [59]3 years ago
4 0
2x^2+20x=-38  divide both sides by 2

x^2+10x=-19, halve the linear coefficient, square it, than add that value to both sides of the equation, in this case add (10/2)^2=25...

x^2+10x+25=6  now the left side is a perfect square

(x+5)^2=6  take the square root of both sides

x+5=±√6  subtract 5 from both sides

x=-5±√6    (so answer c.)
You might be interested in
First piece is 5.2 cm the second piece must be 1.5 times at long as the first
julsineya [31]
What do u need to do? add, subtract, multiply, or divide?
6 0
3 years ago
Harold collected data on the daily high temperature in two cities over a period of one week.
Misha Larkins [42]

Answer:

Correct choices are 1 and 4

Step-by-step explanation:

As per data given we have:

  • Median temperature is 75°F and 88°F
  • And the range from the median is 5° for both cities

This gives us lowest temperatures of:

  • 75° -5° = 70° and 88° - 5°= 83° respectively

And high temperatures are:

  • 75° + 5° = 80° and 88° + 5° = 93°

<u>Answer choices based on above details:</u>

  • Choice 1 - correct
  • Choice 2 - incorrect. Correct answer is 93°
  • Choice 3 - incorrect. Correct answer is 93° - 70° = 23°
  • Choice 4 - correct

3 0
3 years ago
During the day,Sam spent $4.85 on lunch.he also bought 2 books for $7.95 each. At the end of the day we had $8.20 left how much
Vlada [557]
20.75 because if you add 4.85+7.95+7.95 add that you get 20.75

7 0
3 years ago
What is the value of the expression 6x - y when x = 3 and y = 1? (5 points)
Vladimir [108]

Answer:

the answer is 17

Step-by-step explanation:

6×3-1

= 17

6 0
3 years ago
Can u help me please
kow [346]

Answer:

where's the number?

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Rewrite the compound inequality as an absolute value inequality in one variable.
    11·1 answer
  • What is the area of a square with sides of length 6
    11·2 answers
  • Suppose a study estimated that 64% of the residents of a town (with an error range of +-12 percentage points at 95% confidence)
    15·1 answer
  • Will make brainiest pls help :((
    15·1 answer
  • Solve for x<br> 5x/6-2=8
    9·1 answer
  • Find the value of x when y=13. Y=-3x+4
    7·1 answer
  • PLEASE HELP DUDE I AM NOT SMART ENOUGH FOR THIS
    10·2 answers
  • Can someone pls pls help me it’s important
    9·1 answer
  • someone help. i can’t seem to figure this out, it’s simple math but i just don’t understand it i need the answer as soon as poss
    15·1 answer
  • Determine which equation has exactly one real solution. PLS HELPP
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!