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
Mnenie [13.5K]
2 years ago
7

Math help 30 points

Mathematics
1 answer:
mash [69]2 years ago
7 0

Again here we're using like terms

a) -2x² + 12x² = 10x² (they have the same term that's why I grouped them together)

-4x + 2x = -2x

13 - 25 = -12

So the final answer is 10x² - 2x -12

b) 7x² - (-7x²) = 7x² + 7x² or 14x²

4x - (-3x) = 4x + 3x or 7x

-26 - 15 = -41

The final answer to this one is 14x² + 7x - 41

You might be interested in
Are there infinitely many primes p such that p − 1 is a perfect square? In other words: Are there infinitely many primes of the
Vilka [71]
I wish I had an answer for you! Unfortunately, this one has stumped even professional mathematicians for over a century. It was first presented by mathematician Edmund Landau in 1912, and it’s gone unproven ever since. I can’t give you a solution, but I can definitely say you should submit your findings to a mathematical journal if you ever find one!
4 0
3 years ago
The angle of elevation of the sun is 24°. What is the length of the shadow cast by a person 1.82 m tall?
amm1812

Answer:

4.09 m

Step-by-step explanation:

Let the length of the shadow cast by a person be x m.

\tan \: 24 \degree =  \frac{height \: of \: person}{length \: of \: the \: shadow}  \\  \\ 0.4452286853 =  \frac{1.82}{x}  \\  \\ x =  \frac{1.82}{0.4452286853}  \\  \\ x = 4.08778693 \: m \\ x = 4.09 \: m

7 0
3 years ago
Can anyone help? Thank you.
Tcecarenko [31]

Answer:

  91.8 ft

Step-by-step explanation:

So we can talk about the diagram, let's name a couple of points. The base of the tree is point T, and the top of the tree is point H. We want to find the length of TH given the length AB and the angles HAT and ABT.

The tangent function is useful here. By its definition, we know that ...

  TA/BA = tan(∠ABT)

and

  TH/TA = tan(∠HAT)

Then we can solve for TH by substituting for TA. From the first equation, ...

  TA = BA·tan(∠ABT)

From the second equation, ...

  TH = TA·tan(∠HAT) = (BA·tan(∠ABT))·tan(∠HAT)

Filling in the values, we get ...

  TH = (24.8 ft)tan(87.3°)tan(9.9°) ≈ 91.8 ft

The height <em>h</em> of the tree is about 91.8 ft.

6 0
3 years ago
How does one solve this?
Tresset [83]

The answer is a. x\sqrt{7}


3 0
3 years ago
Read 2 more answers
Walter buy a bus pass for $30 every time he writes the bus money is deducted from the value of the past he Road 12 times and $24
Mars2501 [29]
If Walter rode 12 times and 24 was deducted, then each bus ride costs :
24/12 = $ 2 per ride
8 0
3 years ago
Read 2 more answers
Other questions:
  • The parent function f(x) = x3 is represented by graph A. Graph A is transformed to get graph B and graph C. Write the functions
    12·2 answers
  • Solve for x: 4/7 = x-1/12
    14·1 answer
  • Which number line represents all the values of x for the question x (2) = 49
    8·1 answer
  • Define variable in mathematics
    11·2 answers
  • I dont under stand what 5/8 - 2/4
    13·1 answer
  • AB lies on a number line. The coordinate of point A is -6. Given that AB= 20, what are the two possible coordinates for point B?
    5·1 answer
  • What is the answer for <br> 15b+13c-12b+10c+8
    10·2 answers
  • I dont understand this​
    6·1 answer
  • If you apply the changes below to the absolute value parent function, f(x) = [X1,
    13·1 answer
  • Help 47737373737373366261
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!