Answer:
x = 7
Step-by-step explanation:
We know that adding TUW and WUV will give TUV.
So you can substitute the given equations for each and form a lengthy equation
5x + 3 + 10x -5 = 17x - 16
Move all the variables to one side, and the constants to the other
5x + 10x - 17x = -16 - 3 + 5
Simplify!
-2x = -14
x = 7
<span> Let d = cost of hotdog
Let s = cost of soda
</span><span>5d + 3s = 17
2d + 4s = 11</span> <span>Answer: d = $2.50
s = $1.50
</span>Check:<span><span>5(2.5) + 3(1.5)=17
12.5 + 4.5 = 17
17 = 17</span><span>2(2.5) + 4(1.5) = 11
5 + 6 = 11
11 = 11 I have done this problem befoore and this is how i work it out</span></span>
Answer: 20
Step-by-step explanation:
19.64851 to 2s.f
To 2 significant figures
Looking at the digit behind the decimal
It is 6,meaning it is more than 5
So you round up to 1 and add to the digit in front
=20
Answer:
x = 10, y ≈ 11.2
Step-by-step explanation:
Hi there,
We can find the length x first since we are given the lengths of the other two sides of the bottom right triangle. In order to find the length of x, it is important to know the Pythagorean Theorem and the fact that x is the hypotenuse.
+ 
= 
← Pythagorean Theorem
<u>To find x:</u>
+ 
=
100 =
c = 10
Therefore, the value of x is 10.
<u>To find y:</u>
We now know the length of two sides of the upper right triangle. The value of y can be found by using the theorem again.
+ 
= 
+ 100 = 225
= 125
a = 
a = 11.2 when rounded to the nearest tenth.
Therefore, the value of y is approximately 11.2.
Hope this explanation is useful. Cheers.
