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
Svetllana [295]
3 years ago
10

Need help with question a

Mathematics
1 answer:
SVEN [57.7K]3 years ago
4 0

Answer:

1.8 cm

6.3 cm²

Step-by-step explanation:

AC⊥BC

BD=BC=x

  • (x+5)²+x²=7²
  • x²+10x+25+x²=49
  • 2x²+10x- 24=0
  • x²+5x-12=0
  • x=1.8

BC= 1.8 cm

Area of ABC= 1/2*1.8*7= 6.3 cm²

You might be interested in
Give an equation which describes the intersection of this sphere with the plane z=0z=0.
Lady bird [3.3K]
<span><span>C=(<span>x0</span>,<span>y0</span>,<span>z0</span>)</span><span>C=(<span>x0</span>,<span>y0</span>,<span>z0</span>)</span></span><span> and radius </span><span>rr</span>.

<span><span>(x−<span>x0</span><span>)2</span>+(y−<span>y0</span><span>)2</span>+(z−<span>z0</span><span>)2</span>=<span>r2</span></span><span>(x−<span>x0</span><span>)2</span>+(y−<span>y0</span><span>)2</span>+(z−<span>z0</span><span>)2</span>=<span>r2</span></span></span><span> </span>
4 0
3 years ago
If the volume of a cube is 125 cubic feet, what will happen to the volume if each side is increased by 5 feet?
lord [1]
The answer is D hope it helps.

7 0
3 years ago
Read 2 more answers
When you find 100% of a number, how does your answer relate to the original number?
snow_lady [41]

Answer:

i think c.

Step-by-step explanation:


7 0
3 years ago
Read 2 more answers
A store donates 453 laptops to a school. The laptops are divided evenly among the 23 classrooms
Alex73 [517]
19.2 is the answer to your question
4 0
3 years ago
Read 2 more answers
Oliver uses the greatest common factor and the distributive property to rewrite this sum:
dalvyx [7]
The greatest common factor of 64 and 96 is 32, so, the first step after finding the great common factor is convert and rewrite "64 + 96" into distributive property. 

You should get 32(2 + 3)
7 0
3 years ago
Other questions:
  • There are 10soccer teams in the S-league. Each team plays one match against each of the other teams. How many matches will be pl
    5·1 answer
  • At which points are the tangents drawn to the ellipse x 2 + y 2 = [ a ] x + [ a ] y parallel to
    15·1 answer
  • MT&amp;A uses the function f(x)=475-15x-15x.to depreciate smart phones. where f represents the value of smart phone and x repres
    13·1 answer
  • Write a decimal that is 1\10 of 0.9
    14·2 answers
  • WhT is 6811.09 rounded to the nearest ten
    10·1 answer
  • 15 POINTS !!!!! 9-7 3/5 = ______?(Show step by step )
    8·1 answer
  • a boy flies a kite with 100 foot long string. the angle of elevation of the string is 48. how high is the kite from the ground.
    10·1 answer
  • What is the answer for this question?
    11·1 answer
  • <img src="https://tex.z-dn.net/?f=2%20%5Ctimes%202" id="TexFormula1" title="2 \times 2" alt="2 \times 2" align="absmiddle" class
    11·1 answer
  • Simplify.<br> Remove all perfect squares from inside the square root.<br> √180
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!