Which system of equations is equivalent to the following system?
2x + 4y = 14
4x + y = 20

A.) 2x + 4y = 14
-16x - 4y = -80

B.) 2x + 4y = 14
-4x + y = -20

C.) 4x + 8y = -28
4x + y = 20

D.) 0-2x - 4y = 14
4x + y = 20

I wonder why they teeth look like that   and them

Answer:

1) 3 cm hope this helps.

Step-by-step explanation:

Answer:

0.2%

Step-by-step explanation:

4÷20 hope this helps

Answer:

you ate 20% of the candy

Step-by-step explanation:

4/20=1/5 or 20%

BD bisect AC

Option B is the correct answer.

It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.

We have,

From the figure,

FA is perpendicular to BC.

CFA is a right angle.

We see that BD bisects AC such that AD = CD.

Thus,

BD bisects AC

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Answer:

600, 150

Step-by-step explanation:

Kyle is x

ken is y

x = 4y

x+y = 750

replace x with 4y

4y + y = 750

5y = 750

y = 150

so ken earned 150

x + 150 = 750

x = 600

so Kyle earned 600

Answer:

x = 12

Step-by-step explanation:

Given a tangent and a secant from an external point to the circle, then

The square of the tangent is equal to the product of the external part and the entire secant, that is

x² = 6(6 + 18) = 6 × 24 = 144 ( take the square root of both sides )

x = [tex]\sqrt{144}[/tex] = 12

Answer:

−0.8x+4.8y+16

Step-by-step explanation:

4(0.5x+2.5y−0.7x−1.3y+4)

=(4)(0.5x+2.5y+−0.7x+−1.3y+4)

=(4)(0.5x)+(4)(2.5y)+(4)(−0.7x)+(4)(−1.3y)+(4)(4)

=2x+10y−2.8x−5.2y+16

=−0.8x+4.8y+16

Answer:

the greatest common factor is 150

Answer:

0.0381

Step-by-step explanation:

This is a binomial probability distribution problem. Thus;

p = 10% = 0.1

We are told that A random sample of 8 light bulbs are chosen and tested. Thus, n = 8

We want to find the probability that at least 3 are defective. This will be;

P(X ≥ 3) = P(3) + P(4) + P(5) + P(6) + P(7) + P(8)

P(X = x) = C(n, x) × p^(x) × (1 - p)^(n - x)

Thus;

P(3) = C(8, 3) × 0.1³ × (1 - 0.1)^(8 - 3)

P(3) = C(8, 3) × 0.1³ × 0.9^(5)

P(3) = 0.03306744

Repeating this same procedure, we have;

P(4) = 0.0045927

P(5) = 0.00040824

P(6) = 0.00002268

P(7) = 0.00000072

P(8) = 0.00000001

Thus;

P(X ≥ 3) = 0.03306744 + 0.0045927 + 0.00040824 + 0.00002268 + 0.00000072 + 0.00000001 = 0.03809179

Approximately 0.0381

Answer:

x=11

y=48

Step-by-step explanation:

The conjugate number of the complex number 21 - 20i will be 21 + 20i.

The complex conjugate of a complex number is the number that has equal real and imaginary parts that are opposite in sign but equal in magnitude.

In mathematics, a complex number is a part of a number system that includes an element labeled I often known as the imaginary unit, and that extends the real numbers while satisfying the equation i2 = 1.

The given complex number is 21-20i. The conjugate complex number will be:-

21-20i = 21 + 20i

Therefore, the conjugate number of the complex number 21 - 20i will be 21 + 20i.

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Answer:

4/9 are boys

Step-by-step explanation:

Answer:

28ft by 48ft

Step-by-step explanation:

7*4=28, 12*4=48

Answer:

5x= in 8

Step-by-step explanation:

There is no other equation so i hope this is right

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Explanation:

We have 6 green out of 6+6+6 = 18 total

The probability of getting green is 6/18 = 1/3.

After selecting that green jelly bean and not putting it back, we have 6-1 = 5 green out of 18-1 = 17 total.

The probability of selecting another green is 5/17.

Multiply the two fractions 1/3 and 5/17

(1/3)*(5/17) = (1*5)/(3*17) = 5/51

The probability of selecting two greens in a row is 5/51 where we do not put the first selection back. We also do not replace the green jelly bean with some other identical copy.

Note: 5/51 = 0.098039 approximately

Answer:

The answer is your face try again loser

Step-by-step explanation:

If each triangle in the figure is equilateral, the perimeter of the figure would be 18 inches.

Answer:

18 inches

Step-by-step explanation:

1. Multiply 3 by 6

3 x 6 = 18

2. Get answer of 18

18 inches

Answer:

65

Step-by-step explanation:

15*3+15=60

30*2+15=75

20*4+15=85

10*5+15=65

Answer:

263?

Step-by-step explanation:

Answer:

7762

Step-by-step explanation:

product of 325 and 24 is 7800 so 7800-28=7762

Answer: 7ft

Step-by-step explanation:

i just did it

The maximum area covered will be 9 ft².

The region that a circle occupies in a two-dimensional space is known as the area of the circle.

The area of circle is -

A = πr²

Given:

The chemistry teacher decides to use chalk paint to cover a circular portion of a wall in the science lab.

If the greatest distance across the circle is is 3 feet.

We can write the maximum area covered as -

A = πr²

A = 3.14 x 3 x 3

A = 9 ft²  {approx.}

So, the maximum area covered will be 9 ft².

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Answer:

7.8a + 15 =77.4

subtract 15

7.8a = 62.4

divide 7.8

a = 8

Izzie answer 8 answers correct.

Answer:

x=t/5

Step-by-step explanation:

5x=t

multiply both sides by 5 to make x the subject

x=t/5

Answer: 5x=t

              x=t/5(Ans)

Step-by-step explanation:In order to make x the subject,We can start by removing the 5 that is multiplied with x.To do that divide both sides with 5. 5x divided by 5 is x and t divided by 5 is t/5.Therefore the final answer after making x the subject will be x=t/5.

Answer: 1.8 miles per week

Step-by-step explanation:

The European lynx travelled for 301 days and in that time covered a distance of 77.8 miles.

Convert the number of days to weeks:

= 301 / 7

= 43 weeks

If it travelled 77.8 miles in 43 weeks, its speed was:

= 77.8 / 43

= 1.8 miles per week

Answer:

118

Step-by-step explanation:

If angle A is 62 degrees, then angle D is 62 degrees. 62+62=124, and 360-124 is 236 (360 is the total interior angles of any quadrilateral). Then, 236/2=118. You divide it by two because you are looking for angles B and C separately.

1) 7a: 7 times a number

2) 2a+3: 3 more than twice a number

3) 30d, 30 minutes times the number of days she practices.

Answer:

9/5 or 1.8

Step-by-step explanation:

25x(sqd)+81

x(sqd)=81/25

x=sq rt (81/25) = 9/5 =

Answer:

28

Step-by-step explanation:

100 - 72 = 28

The graph for the given exponential function is given below.

The given function is [tex]y=4^x+1[/tex].

Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.

Exponential functions have a horizontal asymptote. The equation of the horizontal asymptote is y=1.

Horizontal Asymptote: y=1

To find the x-intercept, substitute in 0 for y and solve for x. To find the y-intercept, substitute in 0 for x and solve for y.

x-intercept(s): None

y-intercept(s): (0,2)

Therefore, the graph for the given exponential function is given below.

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Answer:

7/1000

Step-by-step explanation:

1 m = 1000 mm

Therefore,

Scale factor = 7/1000