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Alex_Xolod [135]
3 years ago
13

I’m booored can some one talk to me pls

Mathematics
1 answer:
Alborosie3 years ago
3 0

Answer:

hullo

Step-by-step explanation:

You might be interested in
Determine which equation has exactly one real solution. PLS HELPP
sergey [27]

Answer:

b)  4x^2-12x+9=0

Step-by-step explanation:

We can use the discriminant b^2-4ac to determine how many real solutions a quadratic equation in the form ax^2+bx+c=0 has.

  • discriminant > 0 ⇒ 2 real solutions
  • discriminant = 0 ⇒ 1 real solution
  • discriminant < 0 ⇒ no real solutions

5x^2+9x-4=0

b^2-4ac=9^2-4(5)(-4)=161 > 0\implies \textsf{2 solutions}

4x^2-12x+9=0

b^2-4ac=(-12)^2-4(4)(9)=0 \implies \textsf{1 solution}

-9x^2+6x+1=0

b^2-4ac=6^2-4(-9)(1)=72 > 0 \implies \textsf{2 solutions}

-2x^2-7=0

b^2-4ac=0^2-4(-2)(-7)=-56 < 0 \implies \textsf{no solutions}

4 0
2 years ago
from a set of seven math books, nine science books, and five literature books, in how many ways can a student select two from ea
Over [174]
There are 7 math books, 9 science books and 5 literature books. Student has to select 2 books from each set.

This is a combination problem.

Number of ways to select 2 math books from 7 books = 7C2 = 21
Number of ways to select 2 science books from 9 books = 9C2 = 36
Number of ways to select 2 literature books from 5 books = 5C2 = 10

Total number of ways to select 2 books from each set = 21 x 36 x 10 = 7560 ways.

So there are 7560 ways to select 2 books from each set of seven math books, nine science books, and five literature books
6 0
3 years ago
Which expression models this phrase? 27 decreased by the difference of a number and 3 A. (n – 3) – 27 B. 27 – n + 3 C. 27 – (n –
inysia [295]
The answer is c because you have to say 27 minus the number minus 3
7 0
3 years ago
Read 2 more answers
Grace is an hourly employee, and the line that models her total pay in dollars
tresset_1 [31]

Answer: Hello mate!

if x is the amount of hours worked, 45 is the slope and the y intercept is 35.

A linear equation has the form of y = ax + b, where a is the slope and b is the y-intercept, then the equation that we have is:

y = 45*x + 35

this means that she wins $45 per hour, and has a plane amount of $35, indiferent of the amount of hours worked.

Then the correct answer is

C) Grace's wage is $45 an hour, and it appears that she received a  signing bonus of $35.

5 0
3 years ago
Read 2 more answers
Let ABC be an isosceles triangle with AB = AC and ∠BAC=30°. Side AB and the median AD contain points Q and P respectively (point
Svet_ta [14]

Answer:

  15°

Step-by-step explanation:

Since P is on the median of ΔABC, it is equidistant from points B and C as well as from C and Q. Thus, points B, C, and Q all lie on a circle centered at P. (See the attached diagram.)

The base angles (B and C) of triangle ABC are (180° -30°)/2 = 75°. This means arc QC of the circle centered at P has measure 150°. The diameter of circle P that includes point Q is defined to intersect circle P at R.

Central angle RPC is the difference between arcs QR and QC, so is 180° -150° = 30°. Inscribed angle RQC has half that measure, so is 15°.  Angle PQC has the same measure as angle RQC, so is 15°.

Angle PQC is 15°.

5 0
3 years ago
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