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
aliina [53]
3 years ago
14

Janie made a 75% on her math test. If she got 15 problema right, how many questions were on the test?​

Mathematics
2 answers:
DanielleElmas [232]3 years ago
6 0

Answer:

20

Step-by-step explanation:

75% of x = 15

x = 20

lara [203]3 years ago
4 0
20 questions were on her math test
You might be interested in
Find all the zeros of the polynomial function p(x) = x3 – 5x2 + 33x – 29
hram777 [196]

Answer:

\large \boxed{\sf \ \ x=1, \ \ x=2+5i, \ \ x=2-5i \ \ }

Step-by-step explanation:

Hello,

I assume that we are working in \mathbb{C}, otherwise there is only one zero which is 1. Please consider the following.

First of all, <u>we can notice that 1 is a trivial solution</u> as

   p(1) = 1^3-5\cdot 1^2 + 33\cdot 1-29=1-5+33-29=0

It means that (x-1) is a factor of p(x) so we can find two real numbers, a and b, so that we can write the following.

p(x)=(x-1)(x^2+ax+b)=x^3+ax^2+bx-x^2-ax-b=x^3+(a-1)x^2+(b-a)x-b

Let's identify like terms as below.

a-1 = -5 <=> a = -5 + 1 = -4

b-a = 33

-b = -29 <=> b = 29

So

\boxed{ \ p(x)=(x-1)(x^2-4x+29) \ }

Now, we need to find the zeroes of the second factor, meaning finding x so that:

x^2-4x+29=0 \ \text{ complete the square, 29 = 25 + 4}  \\ \\  x^2-2\cdot 2 \cdot x+2^2+25=0 \\ \\ (x-2)^2=-25=(5i)^2 \ \text{ take the root } \\ \\x-2=\pm 5i \ \text{ add 2 } \\ \\  x = 2+5i \ \text{ or } \ x = 2-5i

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0
3 years ago
Can someone plz help with 5, 6 and 7
juin [17]

Answer:

750 people will come in at 15 hours.

Step-by-step explanation:

350 divided by 7=50       50 times 15=750

sorry i don't know  the rest

8 0
3 years ago
Read 2 more answers
Two bugs are running back and forth along a straight branch at constant speeds
Annette [7]
It would be 60cm because 40 plus 20 equals 60
3 0
3 years ago
What is the y-coordinate for the solution to the system of equations?
Marina86 [1]

Answer: i took the test and the answer was

-5

Step-by-step explanation: Good luck!

7 0
2 years ago
Nevermind, i solved my problem
bezimeni [28]

Answer:

What was the problem?

Step-by-step explanation:

Oh ok , I G u e s s it is solved already.

8 0
3 years ago
Other questions:
  • What is the solution for the equation 6x - 8 = 4x? x =
    6·2 answers
  • Identify the parameters in y = a*bkx.
    8·1 answer
  • I need help plz thank u
    12·2 answers
  • Please help! Super confused lol
    13·2 answers
  • What is the side length of a cube with a volume of 166 yd^3
    12·1 answer
  • Marcus needs 108 inches of wood to make a frame how many feet of wood does marcus need
    12·2 answers
  • Which of the following is equal to C(10, 3<br><br> C(3, 10)<br><br> C(10, 7<br> P(10, 3)
    9·2 answers
  • A framing company is putting out a new product this summer. The width of the frame will be uniform all the way around. The desig
    7·1 answer
  • The total length of wires A,B and C is 445cm. Wire A is 45cm longer then wire B,and wire B is half as long as wire C. How long i
    7·1 answer
  • The distance traveled by a falling object is modeled by the equation below, where s is the distance fallen, g is gravity, and t
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!