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
lina2011 [118]
2 years ago
8

Which number sentence is true?

Mathematics
1 answer:
aliya0001 [1]2 years ago
3 0
The answer is A) 1,73<2,1
You might be interested in
In ∆MNP, m∠N = 90º, NH – altitude, m∠P = 21º, PM = 4 cm. Find MH.
Sveta_85 [38]

Answer:

0.51 cm

Step-by-step explanation:

In right triangle MNP, MP = 4 cm, m∠N = 90°, m∠P = 21°

By the sine definition,

\sin \angle P=\dfrac{\text{Opposite leg}}{\text{Hypotenuse}}=\dfrac{MN}{MP}\\ \\MN=MP\sin \angle P\\ \\MN=4\sin 21^{\circ}\approx 1.43\ cm

Now, consider right triangle HMN (it is right because NH is an altitude). By the cosine definition,

\cos \angle M=\dfrac{\text{Adjacent leg}}{\text{Hypotenuse}}=\dfrac{MH}{MN}\\ \\MH=MN\cos \angle M

In the right triangle, two acute angles are always complementary, so

m\angle M=90^{\circ}-m\angle P=90^{\circ}-21^{\circ}=69^{\circ}

Thus,

MH=1.43\cos 69^{\circ}\approx 0.51\ cm

7 0
2 years ago
Which is the last operation performed when evaluating (8-2x)^2+4 for x=3
Salsk061 [2.6K]
Addition will be the last operation
6 0
3 years ago
Read 2 more answers
Steve uses an app that shows him how many kilometers he has run to prepare for a marathon. The app said he ran 6.436 kilometers.
aivan3 [116]
7 miles is what Steve ran 
8 0
3 years ago
Read 2 more answers
Which equation would best help solve the following problem?
forsale [732]
Your answer is <span>–4.9t^2 + 15t + 1 = 0

Hope this helps.

</span>
6 0
3 years ago
2x-y=4 and y=-2x+8.<br><br> Can anyone help me solve
Komok [63]

Answer:

The correct answer is x = 3 and y = 2.

Step-by-step explanation:

There are many ways to solve systems of equations like this, but I'm going to use substitution.  This means taking the value of y given by the second equation and plugging it into the first equation.  This is modeled below:

2x - y = 4

2x - (-2x+8) = 4

Now, we can simplify the left side of the equation.

2x + 2x - 8 = 4

4x - 8 = 4

We should add 8 to both sides as the next step.

4x = 12

Now we can divide by 4.

x = 3

To solve for y, we can substitute this value found for x back into either one of our original equations.

y = -2x + 8

y = (-2*3) + 8

y = -6 + 8

y = 2

Therefore, the correct answer is x = 3 and y = 2.

Hope this helps!

5 0
2 years ago
Read 2 more answers
Other questions:
  • Which expression is equivalent to (2x4y)^3
    6·1 answer
  • Name the property of real numbers illustrated by the equation .
    13·1 answer
  • 44) The difference of two numbers is 76. The second number is 20% of the first number. What are the numbers?
    11·1 answer
  • 1/3 x (9c+12) + (4c)+6
    5·1 answer
  • Write the following in interval notation:<br> x≤7 and x&gt;5
    7·1 answer
  • I need urgent help plz
    5·2 answers
  • Is -9x^2+12x-17 written in standard form ?
    7·1 answer
  • (2.5, 1.3, 2.2, x), mean = 1.8
    13·1 answer
  • Does 4/10 simplify to 1/4?<br> No.<br> Yes.
    11·2 answers
  • 3 • 1/5 = x please help I am having a brain fart and I am running out of time!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!