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
Effectus [21]
3 years ago
10

Solving systems of equations with substitution y=4x-3, 4x+5y=9

Mathematics
1 answer:
never [62]3 years ago
4 0

Answer:

y=1, x=1

Step-by-step explanation:

you put the y variable in the equation 4x-5y=9

and you get that y=1

then you add the y=1 in the forst equatiom amd you get that x=1 as well

You might be interested in
Let x denote the courtship time for a randomly selected female–male pair of mating scorpion flies (time from the beginning of in
gavmur [86]

Complete Question:

a) Is it plausible that X is normally distributed?

b) For a random sample of 50 such pairs, what is the (approximate) probability that the sample mean courtship time is between 100 min and 125 min?

Answer:

a) It is plausible that X is normally distributed

b) probability that the sample mean courtship time is between 100 min and 125 min is 0.5269

Step-by-step explanation:

a)X denotes the courtship time for the scorpion flies which indicates that is a real - valued random variable, and since normal distribution is a continuous probability distribution for a real valued random variable, it is plausible that X is normally distributed.

b) Probability that the sample mean courtship time is between 100 min and 125 min

\mu = 120\\n = 50

P(x_{1}  < \bar{X} < x_{2} ) = P(z_{2}  < \frac{x_{2}- \mu }{SD} ) - P(z_{1}  < \frac{x_{2}- \mu }{SD})

SD = \sqrt{\frac{\sigma^{2} }{n} } \\SD = \sqrt{\frac{110^{2} }{50} } \\SD = 15.56

P(100 < \bar{X}

From the probability distribution table:

P(z_{2}  < 0.32 ) = 0.6255\\ P(z_{1}  < -1.29) = 0.0986

P(100 < \bar{X}

6 0
3 years ago
What is the midpoint of (-7,-9) (6,3)
Advocard [28]

Answer :

Let the first term of both the terms be \:  \sf \: x _1 \:  \: \& \:  \: x _2 and last term be \:  \sf \: y _1 \:  \: \& \:  \: y_2\\

Now, by using the mid point formula to find the mid point of the segment -

\\   \sf \bigg( \frac{x_1 + x_2}{2} , \:  \frac{y_1 + y_2}{2}  \bigg) \\

Now, by substituting the values of both x and y -

\\  \sf \bigg( \frac{ - 7 + 6}{2} , \:   \frac{ - 9 + 3}{2}  \bigg) \\

Adding -7 and 6 -

\\  \sf \bigg( \frac{ - 1}{2} , \frac{ - 9 + 3}{2}  \bigg) \\

Now, move the negative in front of the fraction -

\\  \sf \bigg( \frac{ - 1}{2} , \frac{ - 6}{2}  \bigg) \\  \\  \\  \sf \bigg( \frac{ - 1}{2} , - 3\bigg) \\

6 0
3 years ago
A diagonal support beam is attached to the gate of a fence as shown. Which angles must be congruent in order for the top and bot
statuscvo [17]
Where is it shown? You need to attach a picture or something.

5 0
3 years ago
Whoever answers I’ll mark brainliest
Kamila [148]

Answer:

SAS Postulate

Two sides and the included angle of one triangle are congruent to two sides and the included angle in a second triangle, then the two triangles are congruent.

4 0
2 years ago
The dinner bill came to $72.48, and Julio tipped the waiter 15%. What is the total price of dinner?​
balu736 [363]

Answer:

It is 83.35 Unless your rounding up then it is 84 dollars

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Please help need Help ASAP
    7·2 answers
  • How would you simplify this -5x+2x+7y-3x
    14·2 answers
  • Which of these numbers is not rational?
    13·2 answers
  • 10y - 2x=-6<br> Find the x- intercept and y- intercept
    5·2 answers
  • It takes my’khiyah 40 seconds to run 1/3 of a lap. How many laps can she run in 5 minutes
    5·1 answer
  • -4x-y+4 when x=-1 4 and y=3
    11·2 answers
  • GIVING OUT BRAINLIEST ANSWER! PLZ HELP!!!
    10·2 answers
  • Side XY of triangle XYZ is extended to point W, creating a linear pair with ∠WYZ and ∠XYZ.
    7·1 answer
  • Una librería consta de 5400 libros repartidos en 3 estanterías
    14·1 answer
  • Bütünler iki açıdan büyük olanın ölçüsü küçük olanın ölçüsünün 4 katından 10°eksiktir. Buna göre büyük açı kaç derecedir?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!