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Lana71 [14]
3 years ago
9

What is the answer to-2x+5=-31

Mathematics
2 answers:
7nadin3 [17]3 years ago
8 0

Answer:

x = 18

Step-by-step explanation:

Subtract 5 on both sides:

-2x + 5 =- -31

       -5      -5

-2x = -36

Divide by -2 on both sides:

-2x = -36

/-2     /-2

x = 18    

Neko [114]3 years ago
6 0

Answer: x=18

Step-by-step explanation:

first, add 5 to 31. then, divide both sides by -2. this gives you 18

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butalik [34]
The answer would be 16 because 40 divided by 5 is 8 and 8 times 2 is sixteen so it would be 16
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A medication with an initial concentration of 1. 5 milligrams per liter is administered to a
lesya [120]

Answer: Exponential decay model:

y

=

x

(

1

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t

, half life of tablet is about

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Step-by-step explanation: Initial drug

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100

=

0.3

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Exponential model:

y

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t

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(

1

−

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)

t

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t

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t

or

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t

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2

. Taking logarithm on both sides we get ,

t

log

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0.7

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log

(

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log

(

0.7

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≈

1.94

(

2

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p

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hour

The half life of tablet is about

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mg [Ans]

8 0
2 years ago
Trucks in a delivery fleet travel a mean of 110 miles per day with a standard deviation of 38 miles per day. The mileage per day
Montano1993 [528]

Answer: 0.1824

Step-by-step explanation:

Given : The mileage per day is distributed normally with

Mean : \mu=110\text{ miles per day}

Standard deviation :  \sigma=38\text{ miles per day}

Let X be the random variable that represents the distance traveled by truck in one day .

Now, calculate the z-score :-

z=\dfrac{x-\mu}{\sigma}

For x= 132 miles per day.

z=\dfrac{132-110}{38}\approx0.58

For x= 159 miles per day.

z=\dfrac{159-110}{38}\approx1.29

Now by using standard normal distribution table, the  probability that a truck drives between 132 and 159 miles in a day will be :-

P(132

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6 0
3 years ago
How many different ways can 3 events be ordered?
beks73 [17]

Answer:

6

Step-by-step explanation:

Label them as variables

A, B, and C

Now try and list them

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The more mathematical way is using factorials

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This also gives you 6

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3 years ago
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klio [65]

The sale the company must make and sell to break even is;

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<h3>How many helmets must the company make and sell to break even?</h3>

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CQ

A company plans to sell bicycle helmets for $26 each. The company's business manager estimates that the cost, y, of making x helmets is a quadratic function with a  y-intercept of 8,400 and a vertex of (500, 15,900). How many helmets must the company make and sell to break even?

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