Answer: the number is - 18
Step-by-step explanation:
Let the number be represented by x.
If the sum of a number and seven is doubled, the result is four less than the number. The expression would be
2(x + 7) = x - 4
We would open the bracket on the left hand side of the equation by multiplying each term inside the bracket by 2. It becomes
2x + 14 = x - 4
Subtracting 14 and x from the left hand side and the right hand side of the equation, it becomes
2x + 14 - 14 - x =x - x - 4 - 14
x = - 18
Answer:
D . 0.4
Step-by-step explanation:
let the height be the y coordinate
let the width be the x coordinate
first point :
width/x : 0.5
height/y : 0.8
according to the formula given:
height = constant/width :
so:
0.8 = constant/0.5
constant = 0.4
next point:
x : 0.8
y : 0.5
0.5 = constant/0.8
constant = 0.4
for all of the points, the constant is 0.4
Answer:
3
k
+
20
Step-by-step explanation:
Answer:
The maximum temperature will be of 85 degrees, on July 15.
Step-by-step explanation:
Sine function:
The sine function oscilates between -1 and 1, and it's maximum value is:
y=60+25sin(pi/6)t
The maximum value will occur when , and it will be of 60 + 25 = 85 degrees.
When will it occur?
First we find the value of t for which the value inside the function sine is . So
That is the number of months after April 15, which is 3 months. So July 15.
Answer: Y= 1.6
Step-by-step explanation: 1.6 + 0.4 =2