Answer:
Step-by-step explanation:
Given
--- first discount
--- second discount
Required
Determine the amount paid
First, we add the total discount:
If she got a discount of 40%, then she paid 60% (i.e. 100% - 40%)
So:
Calculate the sales tax
The value of x where the expression –4x – 8 will be equivalent to –9x –1 will be 7/13.
<h3>How to calculate the value?</h3>
It should be noted that we are simply to find the value of x where the expression –4x – 8 will be equivalent to –9x –1.
This will be:
= +4x - 8 = -9x - 1.
4x + 9x = -1 + 8
13x = 7
Divide
x = 7/13
The value is 7/13.
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Answer:
347 is the initial spider population
Step-by-step explanation:
y = ab^x
is the formula for exponential growth and decay
a = the initial value
b is the growth or decay rate
b>1 it is the growth rate (b-1) is the percent
0<b<1 it is the decay rate (1-b) is the percent
y = 347(1.2)^x
347 is the initial spider population
(1.2-1) = .2 = 20 % growth rate
Answer:
=−3
Step-by-step explanation:
=17a+−37−121a+17
=21(a−3)7(−a+3)
=−3
