Answer:
B, D, E
Step-by-step explanation:
-8x - 6y = 10
x + 7y = 9
You can multiply any of these equations by a constant without changing the solution.
B. 4x + 3y = -10 is equivalent to multiplying each side of the first equation by -½.
D. -16x - 12y = 20 is equivalent to multiplying each side of the first equation by 2.
E. 3x + 21y = 27 is equivalent to multiplying each side of the second equation by 3.
A. -2x + 7y = 9 is wrong. The signs don't match those of the second equation.
C. 24x + 18y = 10 is wrong. The signs don't match those of the first equation.
F. x - 14y = -18 is wrong. The coefficient of x should be -2.
Answer:
A 6 units up
Translation rule
Y rule
+= up
-= down
X rule
+= right
-=left
Reflection rule
Reflection over x axis
Y that was once a positive number, is flipped to a negative
example
6,2 reflected over the x axis.
2=-2
Y axis rule example
-2,7 reflected over the y axis
-2=2
Step-by-step explanation:
If it ever says (example,example) like flipped over the x, it will change the y.
Same for a flip over the y, it will change the x
Volume of first oil = A, volume of second oil = B, volume of mixture = M
A = ?, B = 4l, M = A + B
40%A + 25%B = 30%M
40%A + 25%4l = 30%(A+4l)
<span>40%A + 25%4l = 30%A + 30%4l
40A + 100l = 30A + 120l
40A - 30 A = 120l - 100l
10A = 20l
A = 2l
</span>
Answer: 2 litres of 40% oil dressing.
Also note: That's an approximation, because the volumes are not strictly additive. For example: mixing 50ml pure ethanol with 50ml water will give you about 95ml of mixture. To get an accurate answer, you'd have to measure the volume of the final mixture and then divide your total oil content by that<span>.</span>
Answer:
l( longer side ) = 12cm
S (shorter side) =9cm
D's( distance between the shorter side). ( It is also the height. I hope you got the clue…)
Anyway,
Area=9X8=72cm^2
Distance of the longer sides is
Area/the length of the longer side
72/12=6cm…
Distance between the longer sides is 6cm
Hope this helps…
Answer:
M = 8 N = 10
Step-by-step explanation:
Multiplying exponents adds the exponent, meaning that inside of the brackets, it is a^4 * b^5. Multiply the exponents by two because you are squaring the entire equation. Therefore, m=8 and n=10
