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
Anika [276]
3 years ago
13

-x + 3 = 2 ( x + 15 )

Mathematics
1 answer:
Tom [10]3 years ago
3 0

Answer:

x= -9

Step-by-step explanation:

-x+3=2(x+15)

-x+3=2x+30

-x-2x+3=30-3

-3x=30-3

-3x=27

x= -9

You might be interested in
Lola ride her bike for 7/10 of an hour on saturday and 3/5 of an hour on sunday. how much longer did she ride her bike on saturd
OverLord2011 [107]
3/5=6/10
7/10-6/10=1/10
1/10 or 6 minutes longer
6 0
3 years ago
What is greatest common factor of 24, 60, and 36
Mariulka [41]
12 - all divisible by it (2*12=24, 3*12=36, 12*5=60)
3 0
3 years ago
Read 2 more answers
(y-x)(y+x) equals to<br>​
Len [333]
It equals y^2+yx-yx-x^2
6 0
2 years ago
PLEASE HELP
Sholpan [36]
1) We have that the equation is x^2=20y , hence y=x^2/20. The standard equation of such an equation is y=\frac{1}{4p} x^2. Hence, p=5 in this case. The focus is at (0,5) and the directrix is at y=-5 (a tip is that the directrix is always "opposite" the focus point of a parabola; if the directrix is at x=-7 for example, the focus is at (7,0)).
2) Similarly, we have that the equation is x=3y^2 \\  \frac{1}{4p} =3. Thus, p=1/12. In this case, the parabola opens along the x-axis and the focus is at (1/12, 0). Also, the directrix is at x=-1/12. Hence the correct answer is B.
3) We are given that the parabola has a p of 9. Also, the focus lies along the y-axis, hence the parabola is opening along the y-axis. Finally, the focus is on the positive half, so the parabola is opening upwards. The equation for this case is y=y=\frac{1}{4p} x^2= \frac{1}{36 } x^2.
4) Similarly as above. The directrix is superfluous, we only need the p-value. THe same comments about the parabola apply and if we substitute p=8 in the formula: y= \frac{1}{4p} x^2 we get y=\frac{1}{32} x^2.
5) This is somewhat different, even though we do not need the directrix again. The focus lies on the x-axis, thus the parabola opens in this direction. The focus lies on the positive part of the axis, thus the parabola opens to the right. We also are given p=7. Hence, the equation we need is of the formx= \frac{1}{4p} y^2. Substituting p=7, we get x= \frac{1}{28} y^2.
6) The equation of a prabola with a vertex at (0,0) is of the form y=-ax^2. The minus sign is needed since the parabola is downwards. Since we are given anothe point, we can calculate a. We have to take y=-74 and x=14 feet (since left to right is 28, we need to take half). -a= \frac{y}{x^2} = \frac{-74}{14^2} =-0.378. Thus a=0.378. Hence the correct expressions is y=-0.378*x^2
7 0
2 years ago
Read 2 more answers
9 and 11 please I need help
dimaraw [331]
9. <span>1.25 = (1 x 1) + (2/10) + (5/100)

11. is ---C----</span>
5 0
3 years ago
Other questions:
  • 4y+12=6y+12<br> solve the equation
    11·2 answers
  • A meteorologist reports that the chance of snow is less
    6·2 answers
  • FIND INVERSE OF Y=3X+9/7
    10·1 answer
  • Remember that you may need to regroup to subtract. 651,784 - 482,638=
    10·1 answer
  • If x+3y=7 and x-3y=1 what's y
    12·1 answer
  • What fraction is bigger 1/2 or 1/10
    6·2 answers
  • How many wheels are on 27 cars?
    13·2 answers
  • Use SOH CAH TOA to find the missing side
    14·2 answers
  • HELPPPPPPPPPPP PLSS :P
    7·1 answer
  • The number of words Latisha can text, y,
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!