Pls help, Thx! Solve using the substitution method.
y = 2x - 4
6x - 3y = 12

Answer:

1216 kg

Step-by-step explanation:

19/8 = 9.5

128 x 9.5 = 1216

Answer:

First one should be 309 second one should be 624 I may be wrong though since I haven't done volume in years

Step-by-step explanation:

:)

Answer:

A is 381 for the whole thing

B is 792 i think i am not one hundred percent sure on this one but it should be right

Step-by-step explanation:

Answer:

[tex]t= 7.67[/tex]

[tex]t= 10.13s[/tex]

Step-by-step explanation:

Solving (a):

[tex]H=-16t^2+122t+5[/tex]

Required: Time to hit the ground

This means that H = 0

So, we have:

[tex]0=-16t^2+122t+5[/tex]

Rewrite as:

[tex]16t^2-122t-5=0[/tex]

Solve for t using:

[tex]t= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}[/tex]

[tex]t= \frac{122 \± \sqrt{(-122)^2 - 4*16*-5}}{2*16}[/tex]

[tex]t= \frac{122 \± \sqrt{15204}}{2*16}[/tex]

[tex]t= \frac{122 \± 123.3}{32}[/tex]

Split:

[tex]t= \frac{122 + 123.3}{32}[/tex] or [tex]t= \frac{122 - 123.3}{32}[/tex]

[tex]t= \frac{245.3}{32}[/tex] or [tex]t= \frac{-1.3}{32}[/tex]

[tex]t= 7.67[/tex] or [tex]t= -0.0406[/tex]

Time can not be negative. so: [tex]t= 7.67[/tex]

Solving (b):

[tex]h=-16t^2+162t+0.2[/tex]

Required: Time to hit the ground

This means that h = 0

[tex]0=-16t^2+162t+0.2[/tex]

Rewrite as:

[tex]16t^2-162t-0.2= 0[/tex]

Solve for t using:

[tex]t= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}[/tex]

[tex]t= \frac{162 \± \sqrt{(-162)^2 - 4*16*-0.2}}{2*16}[/tex]

[tex]t= \frac{162 \± \sqrt{26256.8}}{32}[/tex]

[tex]t= \frac{162 \± 162.04}{32}[/tex]

[tex]t= \frac{162 + 162.04}{32}[/tex] or [tex]t= \frac{162 - 162.04}{32}[/tex]

[tex]t= \frac{324.04}{32}[/tex] or [tex]t= \frac{-0.04}{32}[/tex]

Time can not be negative. So:

[tex]t= \frac{324.04}{32}[/tex]

[tex]t= 10.13s[/tex]

Answer:

They are equivalent.

Step-by-step explanation:

Answer: cool

Step-by-step explanation:

Answer: ok

Step-by-step explanation: ok

Answer:

214.2mm

Step-by-step explanation:

To find area (I'm assuming a rectangle since you didn't specify)  All you need to do is multiply the two to find area.

Answer: Ted

Step-by-step explanation:

Step-by-step explanation:

Find out the expressions for the number of sweets sue and tony have now .

To proof

As given

Sue has 18 sweets. tony has 18 sweets.sue gives tony x sweets

thus

sue sweets = 18 - x

Tony sweets = 18 + x

As given

Sue then eats 5 sweets. Tony then eats half of his sweets

sue sweets becomes = 18 -5 -x

= 13 - x

Tony sweets become= 18 + x /2

= 9+ x/2

hence proved.

Hence proved

Answer:

x = -2

Step-by-step explanation:

Multiply both sides by 3 to get rid of the fraction:

x - 10 = -12

Add 10 to both sides:

x = -2

Answer:

Width = 15 feet

Length = 45 feet

Step-by-step explanation:

You need to fence in a rectangular piece of land for your dog to run and play. The length is 3 times the width. If the perimeter is 120 ft, what are the dimensions of your very own dog park?

Perimeter of a rectangle = 2L + 2W

The length is 3 times the width.

L = Length = 3W

W = Width

P = 120 ft

Hence:

120 = 2L + 2W

120 = 2(3W) + 2W

120 = 6W + 2W

120 = 8W

W = 120/8

W = 15 feet

Solving for Length

L = 3W

L = 3 × 15 feet

L = 45 feet

Therefore, the dimensions of your very own dog park is

Width = 15 feet

Length = 45 feet

Answer:

A=11

Step-by-step explanation:

11-13=2 and 2 is less than 3

Answer:

Step-by-step explanation:

Input:

a - 13<3

a<16

Answer:

i got no clue

Step-by-step explanation:

ignc

Answer:

Perimeter = 155.6 m

Step-by-step explanation:

Notice from the diagram, that the 55 meters long diagonal is the hypotenuse of a right triangle who has equal legs. Then we can use Pythagoras to find the length of the equal legs of the square:

[tex]hyp^2 = leg_1^2 + leg_2^2\\55^2 = 2\,*\,leg^2\\3025=2*leg^2\\leg=\sqrt{\frac{3025}{2} } \\leg\approx 38.89 \,\,meters[/tex]

Therefore, the perimeter of the square playground is 4 times this value:

Perimeter = 38.89 m *4 = 155.56 m

Since they want the answer rounded to the nearest 10th, we write:

Perimeter = 155.6 m

Answer:  I. 38.9 II. 155.6

Step-by-step explanation:

So we are working on 2 isosceles right triangles formed by the diagonal and two sides as it has two sides of the same length and two 45 degree angles. The two equal sides of an isosceles triangle are known as 'legs' whereas the third or unequal side is known as the 'hypotenuse'

The sides of isosceles right triangles have a peculiar relationship, 1:1:√2, and one way to find the sides is to use the "pattern formula," which only applies to these triangles:

Hypotenuse= Leg*√2

We don't know the answer to the legs yet, so we have to divide both sides by √2.

L= H/√t2= 1/2H*√2. Since our hypotenuse is 55:

L= 1/2*55*√2= (55*1)/2*√2= 27.5*√2

The square root of 2 is 1.414, so multiply:

27.5*1.414= 38.9 (the length of each side.)

If you want to simplify the equation a little more, here is another way of writing it;

sides length²*2=diagonal length².

Since we know each side length, all we have to do to find the perimeter of the square is to:

Perimeter = 4*side

155.6 = 4*38.9

Hope that can help!

Answer:770000

Step-by-step explanation:

That how much they made

Answer:

€8988.75

Step-by-step My bad that's not the answer

Answer:

20 is 80 of 25

Explanation:

20x10/8=25

A percentage is a way to describe a part of a whole. 20 is 80% of 25.

A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

Let the number be x. Therefore, we can write,

80% of x = 20

0.80 × x = 20

x = 20/0.8

x = 25

Hence, 20 is 80% of 25.

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Answer:

LCD-3x(x+2)

Final answer- x2-4x+4/ 3x2+6x

Step-by-step explanation:

okay so LCD is 3*x*(x+2)

= 3x(x+2)

so multiyling the fist expresion by x+2 and the second by x we get

2x+4+ x2-6x/ 3x(x+2)

= so

x2-4x+4/3x(x+2)

x2-4x+4/ 3x2+6x

if my answer helps please mark as brainliest.

Answer:

The distance between them after 30 minutes is 6.5 km.

Step-by-step explanation:

Speed = [tex]\frac{distance}{time}[/tex]

Sarah's speed = 6 km/hr = 1.6667 m/s

Emily's speed = 10 km/hr = 2.7778 m/s

The measure of angle between their bearings = [tex]105^{o}[/tex]

After 30 minutes (1800 seconds);

distance = speed x time

Sarah would have covered a distance = 1.6667 x 1800

                               = 3000 m

                               = 3 km

Emily would have covered a distance = 2.7778 x 1800

                               = 5000 m

                               = 5 km

The distance between them, a, can be determined by applying the cosine rule;

[tex]a^{2}[/tex] = [tex]b^{2}[/tex] + [tex]c^{2}[/tex] - 2bcCos A

   = [tex]5000^{2}[/tex] + [tex]3000^{2}[/tex] -2(5000 x 3000) Cos 105

   = [tex]5000^{2}[/tex] + [tex]3000^{2}[/tex] -2(5000 x 3000) x (-0.2588)

   = 2.5 x [tex]10^{7}[/tex] + 9 x [tex]10^{6}[/tex] + 7764000

   = 41764000

a = [tex]\sqrt{41764000}[/tex]

  = 6462.5073

a = 6462.5 m

The distance between them after 30 minutes is 6.5 km.

Answer:

Im assuming your needing to divide

Step-by-step explanation:

If we do the math then A is 7 and D is 4 making 11 units

Answer:

16.9

Step-by-step explanation:

Answer:

The answer is below

Step-by-step explanation:

Let x represent the amount of iron, y represent the amount of potassium and z represent the amount of mulch.

Since the supplement weighs 16 lb, hence:

x + y + z = 16          (1)

Also supplement contains thirteen times as much mulch as iron. Therefore:

x = 13z

x - 13z = 0     (2)

The supplement also has twice as much potassium as iron, hence:

x = 2y

x - 2y = 0          (3)

solving equations 1, 2 and 3 simultaneously gives:

x = 10.1 lb, y = 5.1 lb, z = 0.8 lb

This means that the soil supplement contains 0.8 lb of mulch

Answer:

C. 336 ways

Step-by-step explanation:

Plz mark as brainliest! :D

Answer: Samples A and B have the same mean, but Sample A has a larger median then Sample B.

Step-by-step explanation:

The median is the middle number in the sequence.

To find the median, place the numbers in order. Then take away, or cross out, one number from each side. Keep going until you are down to one or two numbers. If there is only one number left, that’s your median. If two, add the numbers together and divide by 2.

The mean is the average. To get the mean you add up all the values and subtract that sum by how many numbers there are in the sequence.

Option D is correct for the given conditions, Samples A and B have the same mean, but Sample A has a larger median than Sample B.

The descriptive summary of a data set is known as the central tendency in statistics. It reflects the center of the data distribution through the use of a single number from the dataset. Additionally, it only provides a summary of the dataset rather than information on specific data within the dataset. In general, several statistical metrics can be used to determine a dataset's central tendency.

Given  the data sets of two sets of quiz scores,

Sample A = 5, 5, 5, 5, 5

sample B = 2, 2, 2, 2, 17

mean is the average of total samples,

mean of sample A = (5 + 5+ 5 + 5 + 5 )/5

mean of sample A = 5

Mean of sample B = (2 + 2 + 2+ 2 + 17)/5

mean of sample B = 5

since the mean of both sample are same,

median is the central digit of sets

median of A is 5 and the median of B is 2,

so the median of sample A is larger than sample B.

Hence option D is correct.

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Answer:

60 * 40% = 24

Step-by-step explanation:

just use a calculator

answer =

y = kx ⇒

k = y/x = 5/7

Answer:

the answer is 3/16.

Step-by-step explanation:

First, let's take a look at the expression itself.

We have to multiply 3/8 and 1/2, which gives us the expression of

3/8*1/2

then, we multiply the numerator by the numerator and get 3, then we multiply the denominator by the other denominator which gets us 16. We put the two parts together and get

3/16

which is not simplifiable. So 3/16 is the simplest answer we can get.

Answer: P = 132mm A = 330 mm^2

Step-by-step explanation:

Answer: X = 12, Y = 5

Step-by-step explanation:

4x-27 = x+9

   +27      +27

4x = x + 36

-x     -x

3x = 36

3x/3 = 36/3

X = 12

3y + 19 = 11y - 21

     +21          +21

3y + 40 = 11y

-3y           -3y

40 = 8y

40/8 = 8y/8

Y = 5

The values of x and y are 12 and 5, respectively

The given parameters are:

The slant sides of an isosceles trapezoid are equal.

So, we have:

[tex]EH =FG[/tex]

This gives

[tex]4x - 27 = x + 9[/tex]

Collect like terms

[tex]4x - x = 27 + 9[/tex]

[tex]3x = 36[/tex]

Divide through by 3

[tex]x = 12[/tex]

Also, the diagonals of an isosceles trapezoid are equal.

So, we have:

[tex]EG = FH[/tex]

This gives

[tex]3y + 19 = 11y - 21[/tex]

Collect like terms

[tex]11y - 3y =19 + 21[/tex]

[tex]8y = 40[/tex]

Divide through by 8

[tex]y = 5[/tex]

Hence, the values of x and y are 12 and 5, respectively

Read more about isosceles trapezoid at:

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Answer:

27

Step-by-step explanation:

4/3b=25+11, 4/3b=36,b = 36*3/4 so b = 27