1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
8_murik_8 [283]
3 years ago
12

Use Elimination to solve the system of equations

Mathematics
1 answer:
Step2247 [10]3 years ago
7 0

Answer:

(-9/10, 23/10)

Step-by-step explanation:

You might be interested in
Can someone plz help me with this equation this is hard
nikdorinn [45]

Answer:

5x - 4 = 11

Step-by-step explanation:

4 less than 5 times a number equals 11

5 times a number minus 4 equals 11

(5*x) - 4 = 11

I hope this helps!!!

5 0
3 years ago
Read 2 more answers
Julio has $40.00 to rent bikes for himself and a friend for 5 hours. Each bike
tia_tia [17]

Step-by-step explanation: if its asking  how much money he spends in total you multiply

$3.25 x 5 = 16.25

4 0
2 years ago
Read 2 more answers
The number of major earthquakes in a year is approximately normally distributed with a mean of 20.8 and a standard deviation of
SCORPION-xisa [38]

Answer:

a) 51.60% probability that in a given year there will be less than 21 earthquakes.

b) 49.35% probability that in a given year there will be between 18 and 23 earthquakes.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 20.8, \sigma = 4.5

a) Find the probability that in a given year there will be less than 21 earthquakes.

This is the pvalue of Z when X = 21. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{21 - 20.8}{4.5}

Z = 0.04

Z = 0.04 has a pvalue of 0.5160.

So there is a 51.60% probability that in a given year there will be less than 21 earthquakes.

b) Find the probability that in a given year there will be between 18 and 23 earthquakes.

This is the pvalue of Z when X = 23 subtracted by the pvalue of Z when X = 18. So:

X = 23

Z = \frac{X - \mu}{\sigma}

Z = \frac{23 - 20.8}{4.5}

Z = 0.71

Z = 0.71 has a pvalue of 0.7611

X = 18

Z = \frac{X - \mu}{\sigma}

Z = \frac{18 - 20.8}{4.5}

Z = -0.62

Z = -0.62 has a pvalue of 0.2676

So there is a 0.7611 - 0.2676 = 0.4935 = 49.35% probability that in a given year there will be between 18 and 23 earthquakes.

5 0
3 years ago
Here's another Math one worth 10.
tia_tia [17]
<span>In a 30-60-90  triangle the side opposite the 30 degree angle is half the length of the hypotenuse. 
The short leg is </span>the side opposite the 30 degree angle. If the short leg =x, then the hypotenuse = 2x

The ratio of the short leg to the hypotenuse in the given triangle is cos(60°)

&#10;cos(60^o) = \frac{adjacent \ side}{hypotenuse  } =  \frac{x}{2x} = \frac{1}{2}

Answer is C. 1:2
7 0
3 years ago
Michael can mow a 250 ft2 lawn in 45 minutes. How many minutes long will it take Michael to mow his church’s 1500 ft2 lawn?
Ksju [112]
Should be 270 minutes because 1500 is 250 6 times so you do 45 minutes 6 times which ends up as 270
7 0
3 years ago
Other questions:
  • The distance required to stop a car varies
    11·1 answer
  • please help my teacher doesnt tell us how to do any thing and i dont know how to do this problem: Which graph best represents th
    15·1 answer
  • Which shows rotational symmetry?
    7·2 answers
  • . The psychology club is having a self-proclaimed psychic come to their campus fund-raising event to demonstrate his abilities.
    5·1 answer
  • Aaron creates a stacked cake comprised of three cylindrical sections and plans to cover the top of each section with a different
    8·1 answer
  • How to simplify 16/18
    8·2 answers
  • The numbers of points scored by a football team in 7 different games are
    13·1 answer
  • What is the length of AC
    12·2 answers
  • What is the GCF of 2ab + 8b?
    14·2 answers
  • ;~; someone help me fast! i needa
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!