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
Anastaziya [24]
3 years ago
8

I NEED HELP ASAP PLEASE

Mathematics
1 answer:
Olenka [21]3 years ago
6 0
You have to use the geometric mean of right triangles here.  Your ratio is set up like this:  \frac{3}{y} = \frac{y}{12+3}.  That gives you  y^{2} =45 and that y =3 \sqrt{5}.  To find z in the second part, use the Pythagorean Theorem.  z^{2} =(3 \sqrt{5} ) ^{2} -(3) ^{2} and z = 6.  In the third part, the student should have had the length of the hypotenuse as the denominator in the second ratio, which is 8.  So your answer there is the second one down.  In order to do that last one you need to find the hypotenuse in the triangle that has legs of 4 and 10.  Using Pythagorean's theorem we find that that length is \sqrt{116}.  Now set up your geometric mean:  \frac{4}{ \sqrt{116} }= \frac{ \sqrt{116} }{x+4}.  Cross multiply to get 4x + 16 = 116 and that 4x = 100.  Solve for x to get x = 25
You might be interested in
Helpppppppppppppppppppppp Nowwwwwwww plzzzzzzzzzzzzz
Mazyrski [523]

Answer:

143°

Step-by-step explanation:

=90°+53°

=143°

5 0
3 years ago
Read 2 more answers
How much will you pay the cashier for a candy bar that originally costs 79 cents and is now marked 15% off? Sales tax is 5.5%
Assoli18 [71]
79 cents marked down 15% 
so
79 x (1 - 0.15) 
79 x 0.85 = 67 cents
plus <span>Sales tax is 5.5%

67 x (1.055) = 71 cents

answer
71 cents</span>
6 0
3 years ago
Sound waves are emitted from a fishing boat. Some of the sound waves are reflected by fish and detected back at the boat.The sho
GuDViN [60]

Answer:

195 m.

Step-by-step explanation:

The time for the  sound waves to reach the fish is 0.26/2 = 0.13 seconds.

Distance = speed * time

= 1500 * 0.13

= 195 m.

6 0
3 years ago
In the sophomore class at Dixon high school the number of students taking French is 2/3 of the number taking Spanish. How many s
Elan Coil [88]
I think it's 104. something
4 0
3 years ago
che is buying a computer that costs $2,856.he pays with $100 bills.how many notes will he give the salesperson​
Ksenya-84 [330]

Answer: 29 $100 bills, and would 44 dollars back (not in real life because there would be tax but this is a math problem)

6 0
2 years ago
Read 2 more answers
Other questions:
  • On a Saturday, Saul can cut 4 lawns in 6 hours. If Mitch can mow lawns at the same rate, how long will it take him to mow 9 lawn
    15·2 answers
  • If you were calculating the volume of a cube that has a side length of 8 inches, how would you write the calculations in exponen
    13·1 answer
  • You have 636.3 g of pennies and each penny weighs 3.03g. how many pennies do you have
    6·1 answer
  • 100 equals 15 minus x divided by 5
    12·1 answer
  • Graph
    13·1 answer
  • Find the range of f(x) = –x + 4 for the domain {–3, –2, –1, 1}.
    15·1 answer
  • Need some help with the question look at the attachment file to answer
    5·2 answers
  • Please help ASAP<br>the answer are within the pic
    5·1 answer
  • Molly keeps a record of her money on a calendar. She had $112.64 saved prior to the week shown in the partial calendar. How much
    12·1 answer
  • In an isosceles triangle the measure of the angle formed by two congruent sides is 80° what is the measure of each base triangle
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!