Answer: false false true true
Step-by-step explanation:
there is none
Answer:
let the numbers be
X , y and z
X+ y + z = 20
first number is 4 times the sum of other 2
X = 4(y+ z)
second is 7 times third
y = 7z
now substituting back
X= 4 (7z + z)
X= 32z
32z + 7z + z = 20
40z = 20
z = 1/2
y = 1/2 * 7 = 7/2
X = 1/2 * 32 = 32/2
1/2 * 7/2 * 16 = 28
28 is the answer!
Answer:
13.28
Step-by-step explanation:
Take the total amount she has and subtract what she just earned
23.43 - 10.15
13.28
This is what she had before she started cleaning
Step-by-step explanation:
Area of the shaded region = area of the outer square - area of the inner square
= 22×22 - 15×15 sq ft
= 484 - 225 sq ft
= 259 sq ft
Answer: f(x) = 4*(4)ˣ Option C
Explanation:
We know the standard function of exponential function :
f(x) = a*bˣ
where is initial value
b is growth factor
x is time
Now given that two coordinates (1,32) & (4,2048)
Now put x = 1, f(x) = 32
32 = a*b¹
a*b = 32 ----------------------- (1)
now use second point
2048 = a * b⁴
a*b⁴ = 2048 ----------------------(2)
Now divide (2) / (1)
b³ = 64
b = 4
Put b = 4 in equation (1)
a (4) = 32
a = 8
So, final function is :
f(x) = 8*(4)ˣ