Step-by-step explanation:
let the percent of found balloons be x
given,
total number of balloons= 70
number of found balloons= 28
according to the question,
x% of 70= 28
x/100 × 70 = 28
x=40
hence 40% of the balloons were found
Answer:
Part A: f(4) = 2
Part B: k = -7
Step-by-step explanation:
f(4) simply means what the y-value of the graph is when x = 4.
The parabola crosses the coordinate (4,2). In other words, when x = 4, the graph equals 2.
Part B asks to solve the equation: f(4) + k = -5
We already know from Part A that f(4) = 2. So simply substitute 2 for f(4):
2 + k = - 5
Substract 2 from both sides:
k = -7
Step-by-step explanation:
B) the sum of 3 times a number and 4
Hope it's helpful to you
We want the equation in the form y = mx + b.
We are given that m = -7.
The y-intercept (our b) is 8.
Here it is:
y = -7x + 8
Answer with explanation:
V=Volume of tank
It is given that, X and Y work at constant rates.
Let rate of doing work of X is x hour.
And, Rate of Doing work of Y is y hour.
Statement I----X and Y together fill order in 2⁄3 the time that X alone does.
-------------------------------------------------(1)
Statement II----Y alone does it in twice the time as X alone does.
Substituting the value of y in 1
→x≠ -2, because Rate of doing work can't be negative.
Substituting the value of x in 1, gives
→Rate of doing work of X= 2 hour
→Rate of doing work of Y=1 hour