1/2 / 3/4
= 1/2 x 4/3
= 4/6
= 2/3
a = 2
b = 4
c = 3
d = 2
e = 3
I believe 8. Let me know if this works!
If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer. I want to be able to assist more users one-on-one!
Number of physics textbooks sold was 261 & number of maths textbooks sold was 199.
Let, the number of physics textbooks sold = x
According to the question,
The number of math textbooks sold was 62 less than the number of physics textbooks sold.
So, Number of maths textbooks sold = x-62
The textbook store sold a combined total of 460 physics and math textbooks in a week.
So, the equation becomes,
(x-62)+x = 460
⇒ x-62+x = 460
⇒ 2x-62 = 460
⇒ 2x = 460+62
⇒ 2x = 522
⇒ x = 522/2
⇒ x = 261
So, 261 physics textbooks were sold
(261-62) = 199 maths textbooks were sold.
Learn more about equation here :
brainly.com/question/27893282
#SPJ10
Answer: (x^2)/25 + (16y^2)/375) = 1
Step-by-step explanation:
since foci are symetrically located on x-axis about origin, the equation of the ellipse must be of the following form:
(x^2)/(a^2) + (y^2)/(b^2) = 1, where a = semi-major axis, and b = semi-minor axis,
and: e = eccentricity = sqrt(a^2 - b^2)/a = 0.25; foci located at (+/- sqrt(a^2 - b^2),0) = (+/- 1.25,0)
---> sqrt(a^2 - b^2) = 1.25 ---> 1.25/a = 0.25 ---> a = 1.25/0.25 ---> a = 5; and sqrt(a^2 - b^2) = 1.25 = 5/4
---> a^2 - b^2 = (5/4)^2 = 25/16; or 5^2 - b^2 = 25/16 ---> 25 - b^2 = 25/16;
---> b^2 = 25 - (25/16) = 25[1 - 1/16] = 25(15)/16 = 375/16
---> (x^2)/25 + (y^2)/(375/16) = 1 ---> (x^2)/25 + (16y^2)/375) = 1
Hope this help...and correct it's been awhile..Let me know
