The result correct of this expression is 38
-
In a numeric expression, we first resolve the numbers that are in symbol, such as:
- parentheses, square brackets and braces.
<h3>
</h3>
The signs calculated in order are:
- multiplication/division, addition/subtraction.
<h3>The sign rules are</h3>
- ( - ) = +
+ ( + ) = +
- ( + ) = -
+ ( - ) = -
<h3>Resolution </h3>
So, the answer correct is <u>38</u>
Answer:
<h2>From our analysis stores B has the better buy </h2>
Step-by-step explanation:
Hey there!!!
In this problem, to know actually the store that has the better buy we need to solve for the cost of 1 foot of sandwich from individual stores.
Stores A
if 5 foot cost $42.50
1 foot will cost x
cross multiplying
x= x= $42.50/5
x= $8.5
Stores B
if 6 foot cost $49.50
1 foot will cost x
cross multiplying
x= x= $49.50/6
x= $8.24
<em>From our analysis stores B has the better buy</em>
Answer:
Step-by-step explanation:
7^2+3(4^2+3+2)=
49+3(16+3+2)=
49+3+21=
49+24=
73
I think the answer is 80 pounds
Answer:
0.48 rad/sec
Step-by-step explanation:
From the diagram:
We can find 'x' using trigonometry :
Tanθ = opposite / Adjacent
Opposite = x ; adjacent = 4
Tanθ = x / 4
x = 4tanθ
Let u = 4 and v = tanθ
If dx/dt = 3ft/s ;
dθ/dt when x = 3ft
Differentiate x with respect to t
dx/dt (4tanθ)
Let d/dθ tanθ = sec^2θ
Sec^2θ = 1 / cos^2θ
dθ/dt = 1/4cos^2θdx/dt
dθ/dt = 1/4cos^2θ(3)
dθ/dt = 3/4cos^2θ
When x = 3ft
Cosθ = Adjacent / Hypotenus
Hypotenus = √(4^2 + 3^2
Hypotenuse = √16 + 9 = √25 = 5
Cosθ = 4/5
dθ/dt = 3/4(4/5)^2
dθ/dt = 3/4(16/25)
dθ/dt = 48/100 = 12/25 = 0.48 rad/sec