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Korvikt [17]
3 years ago
9

Which expression is equivalent to -5(-2k+4)

Mathematics
1 answer:
Wittaler [7]3 years ago
7 0
If you distribute -5 to the things in the parenthesis you would get 10k-20 which is the same as -5(-2k+4)
You might be interested in
Evaluate the expression when b= -2, b2 +6b +9
Tema [17]

Answer:

1

Step-by-step explanation:

b= -2, b2 +6b +9

=-2(2)+6(-2)+9

=-4-12+9

=4+9-12

=13-12

=1

4 0
3 years ago
Find the sum of the geometric series 40 + 40(1.005) + 40(1.005)^2 + ⋯ + 40(1.005)^11.
KiRa [710]

Answer:

The sum is 493.4

Step-by-step explanation:

In order to find the value of the sum, you have to apply the geometric series formula, which is:

\sum_{i=1}^{n} ar^{i-1} = \frac{a(1-r^{n})}{1-r}

where i is the starting point, n is the number of terms, a is the first term and r is the common ratio.

The finite geometric series converges to the expression in the right side of the equation. Therefore, you don't need to calculate all the terms. You can use the expression directly.

In this case:

a=40

b= 1.005

n=12 (because the first term is 40 and the last term is 40(1.005)^11 )

Replacing in the formula:

\frac{a(1-r^{n})}{1-r} = \frac{40(1-1.005^{12})}{1-1.005}

Solving it:

The sum is 493.4

4 0
3 years ago
You want to make a necklace with 5 beads on it; you have a bag that contains 5 differently colored beads. You draw a bead from t
Vladimir [108]
There are 120 different combinations.

There are 5 to use for the first bead; then after it is used, 4 for the second; 3 for the third; 2 for the fourth; and 1 for the fifth and last bead:

5*4*3*2*1 = 120.
8 0
3 years ago
Marianne owes $56 for tickets to the school play. If each ticket cost $4, how many tickets did she buy?
Aleks04 [339]
The answer is 14. 54/4=14
3 0
3 years ago
Factor x3-2x2-9x+18 completely if(x+3) is a factor
Charra [1.4K]

Factor x^3 -2x^2-9x+18

= x^2(x - 2) - 9(x - 2)

= (x^2 - 9)(x -2)

= (x + 3 )(x - 3)(x - 2)

So (x+3) is a factor


6 0
3 years ago
Read 2 more answers
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