Sci = π . 2 . 2 = 12,56 ⇒ 1/2 Sc1 = 1/2 . 12,56 = 6,28
Srec = 6 . 4 = 24
S= 6,28 + 24 = 30,28
the answer is 30,28
ok done. Thank to me :>
we know that
in the right triangle ABC
the value of cosine of angle x is equal to
![cos(x)=\frac{AC}{AB}](https://tex.z-dn.net/?f=cos%28x%29%3D%5Cfrac%7BAC%7D%7BAB%7D)
we have
![AC=3.4\ cm\\AB=10\ cm](https://tex.z-dn.net/?f=AC%3D3.4%5C%20cm%5C%5CAB%3D10%5C%20cm)
substitute the values
![cos(x)=\frac{3.4}{10}=0.34](https://tex.z-dn.net/?f=cos%28x%29%3D%5Cfrac%7B3.4%7D%7B10%7D%3D0.34)
Find the measure of angle x
![x=cos(x)^{-1} =arc\ cos(0.34)=70.12\°](https://tex.z-dn.net/?f=x%3Dcos%28x%29%5E%7B-1%7D%20%3Darc%5C%20cos%280.34%29%3D70.12%5C%C2%B0)
Round to the nearest whole degree
![x=70\°](https://tex.z-dn.net/?f=x%3D70%5C%C2%B0)
therefore
<u>the answer is</u>
![70\°](https://tex.z-dn.net/?f=70%5C%C2%B0)
Answer:
Step 3
Step-by-step explanation:
Leonardo is solving the equation 4 (x minus one-fifth) = 2 and two-thirds. His work is shown. Where is his error?
Given :
4(x - 1/5) = 2 2/3
Open the bracket
4x - 4/5 = 2 2/3
Add 4/5 to both sides
4x - 4/5 + 4/5 = 8/3 + 4/5
Lcm of 3 and 5 = 15
4x = (40 + 12) / 15
4x = 40/15 + 12/15
4x = 52/15
Multiply by 1/4
4x * 1/4 = 52/15 * 1/4
x = 52 / 60
x = 13 / 15
Hence, the error is in step 3
15/5 * 3 = 12
Rather ; Leonardo wrote 16
Answer:
-2
Step-by-step explanation:
(5 - a) = 20 + (6a -1) . . . . . 5-a is 20 greater than 6a-1
5 = 7a +19 . . . . . . . . . . . . . add a, collect terms
-14 = 7a . . . . . . . . . . . . . . . subtract 19
-2 = a . . . . . . . . . . . . . . . . divide by 7
The value of the variable is -2.
_____
<u>Check</u>
5 - (-2) = 7
6(-2) -1 = -13
7 is 20 greater than -13, so the answer checks OK.