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seraphim [82]
3 years ago
7

Find the equation of a line that is parallel to y = 2x + 3 and passes through (-1, -1).

Mathematics
1 answer:
Delvig [45]3 years ago
6 0
The answer is A) y=2x+1. When you use the equation y - y1 = m (x - x1) you get y + 1 = 2(x + 1). It simplifies to y + 1 = 2x + 2 and then to y= 2x + 1.
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I need help with substitution and elimination.
Brrunno [24]
To sum it up? or what?
6 0
3 years ago
5 to the power of two
Maksim231197 [3]

Answer:

25

Step-by-step explanation:

5^2 = 25

5 * 5 = 25

6 0
3 years ago
Read 2 more answers
A water well is to be drilled in the desert where the soil is either​ rock, clay or sand. The probability of rock ​P(R)equals=0.
GaryK [48]
The tree diagram for the probability is shown below

P(Clay|Positive) is read 'Probability of Clay given the result is Positive'.

This is a case of conditional probability.

The formula for conditional probability is given as
P(Clay|Positive) = P(Clay∩Positive) ÷ P(Positive)

P(Clay∩Positive) = 0.21×0.48 = 0.1008

P(Positive) = P(Rock∩Positive) + P(Clay∩Positive) + P(Sand∩Positive)
P(Positive) = (0.53×0.53) + (0.21×0.48) + (0.26×0.75)
P(Positive) = 0.2809 + 0.1008 + 0.195
P(Positive) = 0.5767

Hence,
P(Clay|Positive) = 0.1008÷0.5767 = 0.175 (rounded to 3 decimal place)

5 0
3 years ago
Adam put $100 in a savings account. After 10 years, he had $1649 in the
Leno4ka [110]

Step-by-step explanation:

hihi, so this is a classic interest rate problem. It's not too bad if you know your properties of e and ln. After establishing the base equation you can divide by 100 then take the natural log of both sides to "get rid" of the e and finally end it by dividing by 10 to isolate r.

4 0
3 years ago
a veterinarian purchases some medication for $19.50 and wants to make a $2 profit. what is the percent markup on this medication
uysha [10]
So he has to sell it at 19.5+2=21.5 dollars

so assume19.5=100%
the markup is 2 dollars
2=x%
find x if 19.5=100%

so since they are proportionite
19.5:100 and 2:x
if we make them fractions and flip one of them then multiply we will get 1 since
2/4=1/2
2/4 times 2/1=4/4=1 so

19.5/100 times x/2=19.5x/200=1
19.5x/200=1
multiply both sides by 200
19.5x=200
divide both sdies by 19.5
x=10.256 aprox
x=10.3% markup
6 0
3 years ago
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