Hi there! :)
<u>Answer:</u>
The good answer is the top left one, which is:
2x -1(5 - 3x) = 4x +2
2x - 5 + 3x = 4x + 2
Step-by-step explanation:
2x <u>- 1</u>(5 - 3x) = 4x + 2
The correct first step is to distribute the "-1" to the entire parentheses:
-1 × 5 = <u>-5</u>
-1 × -3x = <u>3x</u>
Once this first step is done, you are left with an equation looking like this:
2x - 5 + 3x = 4x + 2
Which is the top left answer for you!
There you go! I really hope this helped, if there's anything just let me know! :)
<span>First of all, there should be coherence for the units of measurement -- either they are all meters or they are all ft. I would assume they are all ft.
The correct answer is 75 ft above. T
The explanation is the following: suppose the ground level is the x-axis, the 2 feet of the arch lie respectively on (0,0) and (100,0) on the ground level. Since the arch is 100ft high, the vertex of the parabola will be the point (100,100). Thus, we can find the equation describing the parabola by putting the three points we know in a system and we find that the equation of the parabola is y=(-1/100)x^2+2
To find the focus F, we apply the formula for the focus of a vertical axis parabola, i.e. F(-b/2a;(1-b^2+4ac)/4a).
By substituting a=-1/100, b=2 and c=0 into the formula, we find that the coordinates of the focus F are (100,75).
So we conclude that the focus lies 75ft above ground.</span>
<span>4.7x + 3.8 = 13.2
</span><span>4.7x + 3.8 - 3.8= 13.2 - 3.8
4.7x = 9.4
x = 2
answer is D. 2</span>
Answer: I'm not 100% sure what your asking but I believe the answer is 12321.
Step-by-step explanation:
Answer:
In quadrilateral ABCD we have
AC = AD
and AB being the bisector of ∠A.
Now, in ΔABC and ΔABD,
AC = AD
[Given]
AB = AB
[Common]
∠CAB = ∠DAB [∴ AB bisects ∠CAD]
∴ Using SAS criteria, we have
ΔABC ≌ ΔABD.
∴ Corresponding parts of congruent triangles (c.p.c.t) are equal.
∴ BC = BD.
