Answer:
0
Step-by-step explanation:
Arc sec(1)=0, tan(0)=0
Answer:
its most likely A
Step-by-step explanation:
Considering it goes at a steady rate with the second variable being reasonably scattered, the level of pure water would obviously go down not up,considering you are adding frogs. than again i havent really reached this degree of mathematics. But through reasoning i beleive it's A
We say that there are
![x](https://tex.z-dn.net/?f=x)
girls. We equate the two expressions for the amount of sweets in the packet to get:
![6x-4=5x+3](https://tex.z-dn.net/?f=6x-4%3D5x%2B3)
Subtracting 5x from both sides and adding 4 to both sides, we see that:
![x=7](https://tex.z-dn.net/?f=x%3D7)
Since there are 7 girls, we have 7*6-4=38 sweets, using the first expression of the amount of sweets. To check our answer, we examine the second expression for the amount of sweets, for a result of 7*5+3=38 sweets. Since both of these amounts are equal, our answer seems to be correct. Thus, there are 38 sweets in a packet.
Answer:
x= 1.5
y= 4.125
Step-by-step explanation:
Step one:
given the two equations
![-2x - 8y = -30-------1\\\\2x + 8y = 36--------2](https://tex.z-dn.net/?f=-2x%20-%208y%20%3D%20-30-------1%5C%5C%5C%5C2x%20%2B%208y%20%3D%2036--------2)
Step two:
let us subtract the equations
![-2x - 8y = -30-------1\\\\ -(2x + 8y = 36)--------2\\\\0x-16y=-66](https://tex.z-dn.net/?f=-2x%20-%208y%20%3D%20-30-------1%5C%5C%5C%5C%20-%282x%20%2B%208y%20%3D%2036%29--------2%5C%5C%5C%5C0x-16y%3D-66)
![-16y=-66\\\\16y=66](https://tex.z-dn.net/?f=-16y%3D-66%5C%5C%5C%5C16y%3D66)
divide both sides by 16
![y=66/16\\\\y=4.125](https://tex.z-dn.net/?f=y%3D66%2F16%5C%5C%5C%5Cy%3D4.125)
put y= 4.125 in equation 2
![2x + 8(4.125)= 36\\\\2x+33=36\\\\2x=36-33\\\\2x=3\\\\x= 3/2\\\\x= 1.5](https://tex.z-dn.net/?f=2x%20%2B%208%284.125%29%3D%2036%5C%5C%5C%5C2x%2B33%3D36%5C%5C%5C%5C2x%3D36-33%5C%5C%5C%5C2x%3D3%5C%5C%5C%5Cx%3D%203%2F2%5C%5C%5C%5Cx%3D%201.5)