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3 years ago

The solution of the equation 2x - 1 - 7 = 9 is x =

Mathematics

2 answers:

Alexeev081 [22]3 years ago

6 0

To solve this, you need to isolate/get the variable "x" by itself in the equation:

2x - 1 - 7 = 9 First you can combine -1 and -7

2x - 8 = 9 Now add 8 on both sides

2x - 8 + 8 = 9 + 8

2x = 17 Divide 2 on both sides to get "x" by itself

$\frac{2x}{2} =\frac{17}{2}$

$x=\frac{17}{2}$ or x = 8.5

PROOF:

2x - 1 - 7 = 9

2x - 8 = 9 Substitute/plug in 8.5 into "x" since x = 8.5

2(8.5) - 8 = 9

17 - 8 = 9

9 = 9

ohaa [14]3 years ago

5 0

Answer:

Step-by-step explanation:

because it is on edg 2020

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12=5x-13x-44. answer it in multi-step equations

fomenos

12=5x-13x-44

combine like terms

12 = -8x -44

add 44 to each side

12+44 = -8x

56= -8x

divide by -8 on each side

56/-8 = x

-7 =x

5 0

3 years ago

Read 2 more answers

A policyholder has probability 0.7 of having no claims, 0.2 of having exactly one claim, and 0.1 of having exactly two claims. C

Sladkaya [172]

Answer:

0.89.

Step-by-step explanation:

So, we are given the following data or parameters or information which is going to aid in the solution to this question or problem. So, the data or parameters are;

(1). "probability 0.7 of having no claims, 0.2 of having exactly one claim, and 0.1 of having exactly two claims."

(2). " distributed on the interval [0,60] and are independent."

(3). "The insurer covers 100% of each claim."

So, taking (1) above we will have;

(Total probability= 0.7 + 0.2 + 0.1 = 0.1)

A = { (0.7 × 0)^2 + (0.2 × 1)^2 + ( 0.1 × 2)^2 =( 0.4) +( 0.4) = 0.8.

0.8 + total probability = 0.8 + 0.1 = 0.9.

So, from the question, we are to "Calculate the probability that the total beneﬁt paid to the policyholder is 48 or less."

Hence, P< 48/A = P < 48/0.9 = P < 53.33.

Thus, 53.33/60 = 0.89.

6 0

3 years ago

Round to the nearest hundredth (Geometric Series problem)

WITCHER [35]

Answer:

15.98

Step-by-step explanation:

∑₁¹⁰ $8(\frac{1}{4} )^{n-1}$

$=8[1+\frac{1}{4} +\frac{1}{16} + ........ +t_{10}]$

We have to use the formula of sum of a G.P. series with common ratio r < 1.

If the first term is a, the common ratio is r and the number of terms is n then the sum [a + ar + ar² + ar³ + ......... up to n terms] is given by

$[a \times\frac{1-r^{n} }{1-r}]$