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
cestrela7 [59]
2 years ago
13

3u - 10 =23 Simplify your answer as much as possible. Ü Х

Mathematics
1 answer:
borishaifa [10]2 years ago
4 0

Answer:

u=11

Step-by-step explanation:

3u - 10 = 20

3u-10+10=20+10 |+10

3u=33 |÷3

3/3*u=33/3

1*u=11

u=11

You might be interested in
PLEASE HELP! I REALLY NEED IT
wolverine [178]
I can’t really help you I’m sorry I don’t really know the answer but I do need points thank you byeAdios
8 0
2 years ago
Read 2 more answers
An airplane's altitude changed -378 feet over 7 minutes. What was the change of altitude in feet per minute?
Charra [1.4K]

are there any options on what it is

5 0
3 years ago
9 x 3/9 is greater than less than or equal to 9?
Elena-2011 [213]

Answer:

9 x 3/9  is less than 9

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= 2 cm.
konstantin123 [22]

Consider right triangle ΔABC with legs AC and BC and hypotenuse AB. Draw the altitude CD.

1. Theorem: The length of each leg of a right triangle is the geometric mean of the length of the hypotenuse and the length of the segment of the hypotenuse adjacent to that leg.

According to this theorem,

BC^2=BD\cdot AB.

Let BC=x cm, then AD=BC=x cm and BD=AB-AD=3-x cm. Then

x^2=(3-x)\cdot 3,\\ \\x^2=9-3x,\\ \\x^2+3x-9=0,\\ \\D=3^2-4\cdot (-9)=9+36=45,\\ \\\sqrt{D}=\sqrt{45}=3\sqrt{5},\\ \\x_1=\dfrac{-3-3\sqrt{5} }{2}0.

Take positive value x. You get

AD=BC=\dfrac{-3+3\sqrt{5} }{2}\ cm.

2. According to the previous theorem,

AC^2=AD\cdot AB.

Then

AC^2=\dfrac{-3+3\sqrt{5} }{2}\cdot 3=\dfrac{-9+9\sqrt{5} }{2},\\ \\AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

Answer: AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

This solution doesn't need CD=2 cm. Note that if AB=3cm and CD=2cm, then

CD^2=AD\cdot DB,\\ \\2^2=AD\cdot (3-AD),\\ \\AD^2-3AD+4=0,\\ \\D

This means that you cannot find solutions of this equation. Then CD≠2 cm.

8 0
3 years ago
Read 2 more answers
Sally has 9 more cats than dogs write a standard form equation in c,d order this situation implies​
nalin [4]
I think it will be : 9+c=d
8 0
3 years ago
Other questions:
  • PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT
    13·2 answers
  • In a video game, Charles scored -250 points on his second play this brought his total score to 500. What was his score on the fi
    12·2 answers
  • Susan and teo play soccer. Susan's team play every five days and twos team plays every six days when will the teams play on the
    11·1 answer
  • Last month, a car dealership sold 184 new cars. To determine customer satisfaction, the sales manager asked all of these newcar
    7·1 answer
  • Write the algebraic expression that represents the following:
    9·1 answer
  • 6(41 - 21) - 6(20 - 2) =
    5·1 answer
  • Johann fits a linear model to a set of data. The line of best fit has the equation y=0.331986x+5.33286. The scatter plot with th
    11·1 answer
  • If you get 76% on a 50 question test how many questions did you get wrong?
    14·2 answers
  • For the quadratic function below, what is the rate of change over the interval.
    11·1 answer
  • 2x^3/3y equivalent expressions
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!