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2 years ago

Solve the equation 7x-4(-4x-16)= -166

Mathematics

2 answers:

kvv77 [185]2 years ago

5 0

Answer: x = -10

Isolate the variable by dividing each side by factors that don't contain the variable.

Vikki [24]2 years ago

3 0

Answer:

x= -10

Step-by-step explanation:

7x-4(-4x-16)=-166 foil the ()

7x+16x+64= -166 combine terms

23x+64= -166 subtract 64 to both sides

23x= -230 divide by 23

x= -10

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In 2007, the population of Ecuador was estimated at

swat32

Answer:

In 2012 , the population will be 15 million

Step-by-step explanation:

We start by setting up an exponential equation that defines the increase

P(t) = I(1 + r)^t

P(t) represents the present population = 15 million

I is the population in 2007 which is 13.8 million

r is 1.6% = 0.016

t is what we want to calculate

15 million = 13.8 million (1 + 0.016)^t

15/13.8 = (1.016)^t

1.09 = (1.016)^t

ln 1.09 = t ln 1.016

t = ln 1.09/ln 1.016

t = 5.429 which is approximately 5

So in 2007 + 5 = 2012, the population will be 15 million

8 0

3 years ago

Create a set of data with 7 values that has a mean of 30, a median of 26, a range of 50, and an interquartile range of 36.

kotykmax [81]

5, 10, 23, 26, 45, 46, 55

7 0

2 years ago

Suppose Y varies directly with x, and y = 25 when x = 140. what is the value of x when y = 36?

Tema [17]

25y.......140x

36y..........x

Cross multiply

25x= 36*140

25x= 5040

x= 5040/25

x= 1008/5

x= 201.6

When y=36 the x will = 201.6

I hope that's help !

4 0

3 years ago

The area of an 20 -cm-wide rectangle is 440 cm. What is its length?

Nataly [62]

Answer:

22cm

Step-by-step explanation:

440÷20

8 0

3 years ago

What is the nth term of the geometric sequence 4, 8, 16, 32, ... ?

Morgarella [4.7K]

Geometric is
$a_n=a_1r^{n-1}$
an=nth term
a1=first term
r=common ratio
n=which term

commmon ratio is like
a1 times r=a2
4 to 8
4 times 2=8
r=2
first term is 4
therefor

$a_n=4(2)^{n-1}$
the nth term is $4(2)^{n-1}$

3 0

3 years ago