Mathematics College

PLEASE HELP ME :(. Look at this system of equations.
X - 8y = -3
5x - 2y = 4
What value of a will make this system have the same solution?
ax = -19
5x - 2y = 4

Answers

Answer 1

9514 1404 393

Answer:

a = -19

Step-by-step explanation:

In the first set of equations, subtract 4 times the second equation from the first.

(x -8y) -4(5x -2y) = (-3) -4(4)

-19x = -19 . . . . simplify

Comparing this to the equation ...

ax = -19

we see that they will have the same solution when a = -19.

Related Questions

Identify the transformation that was applied to this letter.
HELPoo

Answers

reflection over y-axis

four causes of solar eclips

Answers

Answer:

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface

1. A polygon is convex if all the diagonals are found in the___ of a polygon.
A. exterior
B. interior
C. equilateral
D. equiangular
2. A regular polygon is both equiangular and____.
A. equal
B. equivalent
C. equilateral
D. concave

Answers

A polygon is convex if all the diagonals are found in the interior of a polygon.

A regular polygon is both equiangular and equilateral

Option B and C

What is Polygon?

A polygon is simply defined as a shape, A polygon is a flat-surfaced two-dimensional shape that has straight sides.

In conclusion

A polygon is convex if all the diagonals are found in the interior of a polygon.

A regular polygon is both equiangular and equilateral

Answers

the answer is y=-5x+5

The print on the package of -watt General Electric soft-white light-bulbs says that these bulbs have an average life of hours. Assume that the lives of all such bulbs have a normal distribution with a mean of hours and a standard deviation of hours. Find the probability that the mean life of a random sample of such bulbs will be

Answers

Answer:

Hi your question is incomplete attached below is the complete question

answer : p ( X < 725 ) = 0.0116

Step-by-step explanation:

Given data:

Average life of bulbs (μ ) = 750 hours

standard deviation (б ) = 55 hours

n ( sample size ) = 25

X = 725

Probability that the mean life of a random sample of 25 bulbs will be less than725 hours

p ( X < 725 ) = p (( X - μ )/ б √n < 725 - 750 / 55√25 )

= P ( Z > - 2.27 )

Hence P ( X < 725 ) = 0.0116 ( using Z-table )

UN

2. What is the conversion from cubic metres to litres?

Answers

Answer:

1 cubic meter equals 1000 liters

Step-by-step explanation:

i think this is right

using appropriate properties find 9/16×4/12+9/16×-5/9

Answers

Answer:

-1/8

Step-by-step explanation:

Given 9/16×4/12+9/16×-5/9

Using the PEMDAS rule;

Multiplication first

(9/16×4/12)+(9/16×-5/9)

= 3/4 * 1/4 + -5/16

= 3/16 - 5/16

= (3-5)/16

= -2/16

= -1/8

Hence the required answer is -1/8

Please help me with the two questions☹️

Answers

which two questions???

What 2 questions, you did not put anything

Which Trig ratio should be used to find the missing side?

A.Sin

B.Cos

C.Tan

Answers

Answer:

tan

Step-by-step explanation:

take 53 degree as reference abgle

tan 53=opposite /adjacent

1.32=15/x

x=15/1.32

x=11.36

x=11.4

What annual rate of interest would you have to earn on an investment of $5500 to ensure receiving $434.50 interest after one year?
PLEASE HELPPPP

Answers

answer: 0.079 , 7.9%
434.50/5500 = 0.079

an aquarium at the zoo is shaped like a cylinder. it has a height of 4 feet and a base radius of 2.5 feet. the aquarium is being filled with water at a rate of 12 gallons per minute. if one cubic foot is about 7.5 gallons, how long will it take the aquarium to fill? round to the nearest whole minute.

Answers

Answer:

49 minutes

Step-by-step explanation:

Volume

v = πr²h

v = π(2.5²)4

v = 78.5 ft³

--------------------------

Gallons needed

78.5 * 7.5 = 588.75 gallons

----------------------

Time to fill

588.75 / 12 = 49.0625

Rounded

49 minutes

HELP ME PLEASEEEEEEEEEEEE

Answers

the answer is b (-3,3) can i have brainliest

A school is making digital backups of old reels of film in its libraries archives the table below shows approximate run times of the film's for giving diameter of filming the reel.

which of the following equations is a good model for the run time, Y, as a function of the diameter, X

Answers

Answer:

Step-by-step explanation:

Which set of data has the smallest difference between the mean and the median?
O A 13, 42, 17, 26, 38
OB. 28, 7, 36, 8, 17
OC 14, 29, 38, 7, 13
OD 23, 36, 25, 38, 30

Answers

Answer:

D 23, 36, 25, 38, 30

Step-by-step explanation:

Mean of a data-set:

The mean of a data-set is the sum of all it's values divided by the number of values.

Median of a data-set:

The median of a data-set is the value that separates the lower 50% from the upper 50% on the ordered set.

If the cardinality n is odd, as in this case, the median is the element at the position (n+1)/2. Since in this case, n = 5, the median is the 3rd element in the ordered set.

A 13, 42, 17, 26, 38

Ordered set: 13, 17, 26, 38, 42

Median: 26

Mean: (13+17+26+38+42)/5 = 27.2

Difference: 27.2 - 26 = 1.2

B. 28, 7, 36, 8, 17

Ordered set: 7, 8, 17, 28, 36

Median: 17

Mean: (7+8+17+28+36)/5 = 19.2

Difference: 19.2 - 17 = 2.2

C 14, 29, 38, 7, 13

Ordered set: 7, 13, 14, 29, 38

Median: 14

Mean: (7+13+14+29+38)/5 = 20.2

Difference: 20.2 - 14 = 6.2

D 23, 36, 25, 38, 30

Ordered set: 23, 25, 30, 36, 38

Median: 30

Mean: (23+25+30+36+38)/5 = 30.4

Difference: 30.4 - 30 = 0.4

Option d has the smallest difference.

what is the circumference?

Answers

Answer:

Circumference is the area around the whole circle

Step-by-step explanation:

Answer:

The circumference is 50.2

Step-by-step explanation

I worked it out by

C = 2 * π *

What number added to four and five-tenths, is twelve?

Answers

Answer:

7.5

Step-by-step explanation:

give brainliest and thank me now!

seven and five-tenths

Step-by-step explanation:

it’s a non calc question

Answers

Answer:

60 Degrees

Step-by-step explanation:

trust me

The area of a rectangle is 200 square feet. Find its length if its width is 10 feet.

Answers

Answer:

Step-by-step explanation:

In area you have to multiply so 10 x ? = 200

10 x 20 = 200

The quotient of 9 and 3 subtracted from the product of 6 and 2

Answers

Answer:

(6⋅2)−(9/3)

Simplify each term.

12−3

Subtract 3 from 12.

Step-by-step explanation:

Petra is making necklaces to sell at a craft fair. The hardware for each necklace costs $3.75,
and each bead costs $0.50. The number of beads Petra needs depends on the design she
chooses. Which expression gives the total cost to make 30 necklaces with b beads?
30 (4.25b)
30 (3.75b + 0.5)
30 (0.55 +3.75)
30 (0.5b) + 3.75

Answers

the answer would be 30(0.5b)+3.75 i think because .50 would have to have a variable since we don’t know the number of beads.

PLS HELP 40 POINTS

A rectangular prism has a surface area of 8 square feet. A similar rectangular prism has a surface area of 200 square feet. How many times larger are the dimensions of the larger prism?

25
625
5
10

Answers

Answer:

C. 5

Step-by-step explanation:

The area is the product of two dimensions.

If the ratio of sides is k, then the ratio of areas is k²

We have:

k² = 200/8k² = 25k = √25k = 5

Correct choice is C

Answer:

Have a great day/night!

If x=9, what is the value of y in the following equation?
2y= 2x^2/3 +6

Answers

Answer:

I think the answer is A........

2×81=162

162/3=540

54+6=60

60/2=30

PLEASE HELP ME I NEED THE ANSWER TO THIS

Answers

Answer:

295sq feet

Step-by-step explanation:

25*10=250

5*5=25

5*4=20

250+25+20=295

Answer:

295

Step-by-step explanation:

295

Please please help!!!!

Answers

Answer: its 30

Step-by-step explanation:

What is the radius of a circle whose equation is (x + 5)2 + (y – 3)2 = 42?

Answers

Answer:

Radius = [tex]\sqrt{42}[/tex]

Step-by-step explanation:

suppose that a population parameter is 0.2, and many samples are taken from the population. As the size of each sample increases, the mean of the sample proportions would approach which of the following values?
A. 0.1
B. 0.3
C. 0.4
D. 0.2

Answers

Answer:

D 0.2

Step-by-step explanation:

YES THIS IS RIGHT

The required, mean of the sample proportions would approach is 0.2.

What is a normal distribution?

Normal distributions can be altered to standard normal distributions by the formula:

Z = (X - μ)/σ

As the size of each sample increases, the mean of the sample proportions would approach the population parameter, which in this case is 0.2. This is known as the central limit theorem.

Therefore, the answer is D. 0.2.

Learn more about normal distribution here: https://brainly.com/question/12421652

#SPJ2

2+9n=72
how do you find what n equals?

Answers

Answer:

the correct answer is 7.78

Why 117+3 = 5! is correct

Answers

Answer:

5!= 5×4×3×2×1

117+3=120

5×4×3×2×1= 120

therefore 117+3=5! is correct

The statement 117+3 = 5! is correct because;

The left hand side and right hand side give the same solution of 120.

We want to find out why 117 + 3 = 5! is correct.

Let us first find the left hand side of the equation;

117 + 3 = 120

Now, for the right hand side, 5! simply means 5 factorial.

Factorial of a number is a term used in maths to denote the product of all

positive integers less than or equal to that number. For example; n!. That is

factorial and it means the product of all positive integers below n.

Let's apply the concept of factorial to 5!.

All positive integers less than or equal to 5 are; 5, 4 , 3, 2, 1

Thus; 5! = 5 × 4 × 3 × 2 × 1 = 120

This 5! = 120 and it is the same as 117 + 3 = 120. Thus the given statement in the question is true.

Read more at; https://brainly.com/question/24115376

Given: AC Bisects Statements reasons

Help needed today due today I will give brainliest to correct answer

Answers

Answer:

Answer:

Solution given;

<BCA=<ACD

<ABC=<ADC

now

In traingle ABC & ∆ ACD

AC=AC[common base]

<BCA=<ACD[bisector bisect it]

<ABC=<ADC[Given]

∆ABC is congruent to ∆ ACD by S.A.A. axiom

AB is congruent to AD.

[ corresponding sides of a congruent triangle are equal]

Hence proved.

What is the perimeter of a square window with sides 36 inches long

Answers

Answer:

Perimeter = 144 inches

Step-by-step explanation:

Perimeter of the square = area of one side x 4

36 x 4 = 144 inches

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PLEASE HELP ME :(. Look at this system of equations. X - 8y = -3 5x - 2y = 4 What value of a will make this system have the same solution? ax = -19 5x - 2y = 4

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PLEASE HELP ME :(. Look at this system of equations.
X - 8y = -3
5x - 2y = 4
What value of a will make this system have the same solution?
ax = -19
5x - 2y = 4