Please help will give 20 points thank you good answers please

Answer:

Cost of a kit is $20

cost of a microscope is $80

Step-by-step explanation:

Here, we want to write a set of equations and solve

Let the cost of a microscope be $m while the cost of a kit be $k

Total cost of 38 microscopes will be 38 * m = $38m

Total cost of 47 kits = 47 * k = $47k

The sum of these is $3980

That will be;

47k + 38m = 3980 ••••••(i)

A microscope cost 4 times a kit

Mathematically;

m = 4k •••••••••(ii)

Substitute ii into i

47k + 38(4k) = 3980

47k + 152k = 3980

199k = 3980

k = 3980/199

k = $20

Recall;

m = 4k

m = 4 * 20 = $80

Answer:

12

Step-by-step explanation: You start in Kansas City, you have 3 options to chose from to go to Blue Springs. Then you have 4 more choices to chose from to go to Grain Valley. So you have 3 routes to chose then 4 so multiply those together. So you get 12

Answer:

simplified = 8x - 8

Step-by-step explanation:

trust me :)

Answer:

It’s A.

Step-by-step explanation:

Answer:

Square has a perimeter : P =4 x a => a = P/4 = 20.5/4 = 5.125 feet

Step-by-step explanation:

Answer:

the answer is:

The dilation is an enlargement because the image, triangle A'B'C', is larger than the pre-image, triangle ABC.

Step-by-step explanation:

I got it right on edge

The dilation from triangle ABC to triangle A'B'C' is an enlargement

Dilation involves changing the size of a shape, figure or line

From the question, we understand that:

Triangle ABC is enlarged to form triangle A'B'C'

Also from the diagram, we can see that the side lengths of triangle A'B'C' are bigger than ABC

Hence, the dilation is an enlargement

Read more about dilation at:

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Answer:

c=0.75m+85

Step-by-step explanation: m=slope and since its increasing by the same amount every mile $0.75 is the slope, and since it starts at $85 that would be the y-intercept. Hope this helps!

Answer:

Jonathan is 39

Jayla is 78

Step-by-step explanation:

13: Sam

? 1: Jonathan 3*sam

? 2: Jayla 2* Jonathan

13 * 3 = 39

Jonathan is 39

39 * 2 =  78

Jayla is 78

Answer: The seagull is faster

Step-by-step explanation:

An owl travels 8 1/3 miles in 3/4 hour. The miles per hour of the owl would be:

= 8 1/3 ÷ 3/4

= 25/3 ÷ 3/4

= 25/3 × 4/3

= 100/9

= 11 1/9 miles pee hour

A seagull travels 12 1/2 miles in 2/3 an hour. The miles per hour of the seagull would be:

=12 1/2 ÷ 2/3

= 25/2 ÷ 2/3

= 25/2 × 3/2

= 75/4

= 18 3/4 miles per hour

Based on the calculation above, the seagull is faster.

Answer:

11 1/9 miles per hour<---- owls speed

I seagle is faster

Step-by-step explanation:

i just know bc i got it right on iready... :)

Answer:

12% = 0.12

Percent means 'per 100'. So, 12% means 12 per 100 or simply 12/100. If you divide 12 by 100, you'll get 0.12

Answer:

0=0

yeah i dont know how i got it, but yeah

Answer:

120

Step-by-step explanation:

No. of plastic cups = 24

No. of straws =20

We need to find the smallest number of each that could be bought so that you had the same amount of cups and straws.

Prime factrisation of 24 = 2×3×2×2

Prime factorisation of 20 = 2×5×2

LCM = 120

Hence, the smallest number of each type will be 120.

Answer: 55 = x

Step-by-step explanation:

a line is 180'

so all you do is

180 - 125 = x

the 35 and 90' is to throw you off

55 = x

Answer:

x=55

Step-by-step explanation:

Angles on a straight line add up to 180 degrees

Angle 35, 90(the box) and x are all on a straight line

35 + 90=125

180-125=55

x=55

Answer:

x=-4

Step-by-step explanation:

Answer:

it could be 1/1 or 2/2 or 3/3 or 4/4 or 5/5 or 6/6 it is the same thing just put the number like how i did depending on the question

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

13-5

Answer:

I don't get what you are trying to say I think you need to put it in better understanding

We need to make the denominators equal for both fractions to figure out how much sugar was used in all.

3/4 + 1/2

We can multiply the numerator and the denominator by 1 for 3/4. We can multiply the numerator and the denominator by 2 for 1/2. Therefore, we will get 1.

3/4 + 1 = 1 3/4 OR  7/4

Answer is 7/4 or 1 3/4.

Answer: 2 2/3 (two and two thirds)

Each person get 6 2/3 fraction of a whole sub.

Fractions represent the parts of a whole or collection of objects.

A fraction has two parts. The number on the top of the line is called the numerator and the number on the top of the line is called the denominator.

Now it is given that,

Number  of people = 8

Number of sub sandwiches = 3

So, fraction of a whole sub does each person get = Number  of people / Number of sub sandwiches

⇒ fraction of a whole sub does each person get = 8/3

or,  fraction of a whole sub does each person get = 6 2/3

Thus, each person get 6 2/3 fraction of a whole sub.

To learn more about fractions :

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Answer:

6a + 6b

Step-by-step explanation:

Answer:

Yes. A is the correct answer. I did the work.

Step-by-step explanation:

Answer:

negative

Step-by-step explanation:

right-to-left is positive

left-to-right is negative

Answer:

Negative slope.

Step-by-step explanation:

When you try to determine the type of slope a graph shows, the direction of the line is really important. When a slope is positive, the line goes up in the right direction like this /. When a slope is negative, the line goes down to the right like this \. Undefined is when the line goes straight up and down and 0 is when the graph is straight across like this -. Therefore the graph is negative. Hope this helps :)

Answer:

Jill  = 125lb

Pete = 175lb

Eddie = 157lb

Ken = 140lb

Step-by-step explanation:

Given

Represent Jill with J; Ken with K; Pete with P and Eddie with E

[tex]J = K - 15[/tex]

[tex]P = 50 +J[/tex]

[tex]E = P - 18[/tex]

[tex]J + K + P + E = 597[/tex]

Required

Determine the weight of each

Substitute 50 + J for P in [tex]E = P - 18[/tex]

[tex]E = 50 + J - 18[/tex]

[tex]E = J + 50 - 18[/tex]

[tex]E = J + 32[/tex]

Make K the subject in [tex]J = K - 15[/tex]

[tex]K = J + 15[/tex]

Substitute [tex]K = J + 15[/tex], [tex]E = J + 32[/tex], [tex]P = 50 +J[/tex] in [tex]J + K + P + E = 597[/tex]

[tex]J + J + 15 + 50 + J + J + 32 = 597[/tex]

Collect Like Terms

[tex]J + J +J + J = 597 - 32 - 50 - 15[/tex]

[tex]4J = 500[/tex]

[tex]J = 500/4[/tex]

[tex]J = 125lb[/tex]

Substitute 125 for J in [tex]P = 50 +J[/tex]

[tex]P = 50 + 125[/tex]

[tex]P = 175lb[/tex]

Substitute 175 for P in [tex]E = P - 18[/tex]

[tex]E = 175 - 18[/tex]

[tex]E = 157[/tex]

Substitute 125 for J in [tex]K = J + 15[/tex]

[tex]K = 125 + 15[/tex]

[tex]K = 140[/tex]

Answer and Explanation

__________________________________________________________

B) 2x - 5 = 2y + 14

__________________________________________________________

slope intercept form: y = mx + b

__________________________________________________________

B) 2x - 5 = 2y + 14 is the only answer choice that does not isolate y, and place all other terms on the other side; therefore, is your answer.

__________________________________________________________

Hope this helps! <3

__________________________________________________________

Answer:

9/10 > 7/8

Step-by-step explanation:

The least common denominator (LCD) is: 40.

Rewriting as equivalent fractions with the LCD:

9/10            7/8

36/40 35/40

Comparing the numerators of the equivalent fractions we have:

9/10   7/8

36/40 > 35/40

Therefore, comparison shows:

9/10 > 7/8

<3

Answer:

Option A, Option D and Option E are correct options.

Step-by-step explanation:

We need to find solutions of the inequality: [tex]2x^2-1>6x[/tex]

We will check the options and see, which options satisfy the inequality.

Option A

x=-4

Put x=-4

[tex]2x^2-1>6x\\2(-4)^2-1>6(-4)\\2(16)-1>-24\\32-1>-24\\31>-24\:\:True[/tex]

So, x=-4 is the solution of inequality.

Option B

x=3

Put x=-3

[tex]2x^2-1>6x\\2(3)^2-1>6(3)\\2(9)-1>18\\18-1>18\\17>18\:\:False[/tex]

So, x=3 is not the solution of inequality.

Option C

x=1

Put x=1

[tex]2x^2-1>6x\\2(1)^2-1>6(1)\\2(1)-1>6\\2-1>6\\1>6\:\:False[/tex]

So, x=1 is not the solution of inequality.

Option D

x=5

Put x=5

[tex]2x^2-1>6x\\2(5)^2-1>6(5)\\2(25)-1>30\\50-1>30\\49>30\:\:True[/tex]

So, x=5 is the solution of inequality.

Option E

x=-2

Put x=-2

[tex]2x^2-1>6x\\2(-2)^2-1>6(-2)\\2(4)-1>-12\\8-1>-12\\7>-12\:\:True[/tex]

So, x=-2 is the solution of inequality.

So, Option A, Option D and Option E are correct options.

Answer:

100,000=10^5,  and 1/100,000= 1/10^5=10^-5

so this is your answer

10^5 x 10^-5

Step-by-step explanation:

Sample answer from Edmentum.

The exponential value of  1,00,000 and 1/1,00,000 is 10⁵ and 10⁻⁵.

The formula for an exponential function is f (x) = axe, where x is a variable and an is a constant that serves as the function's base and must be bigger than 0. The transcendental number e, or roughly 2.71828, is the most often used exponential function basis.

Given numbers 1,00,000 and 1/1,00,000

factors of 1,00,000 = 10 x 10 x 10 x 10 x 10

1,00,000 in exponential form is 10⁵ because 10 is multiplying continuously 5 times.

and 1/1,00,000 = 1/(10⁵)

using formula 1/aⁿ = a⁻ⁿ

so  1/(10⁵) = 10⁻⁵

Hence exponential for numbers is  10⁵ and  10⁻⁵.

Learn more about exponential functions;

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Answer:

0.33333333333

Step-by-step explanation:

You divide 2÷4×4÷6= 0.33333333333

Answer:

8/24

Step-by-step explanation:

2/4 x 4/6

All you need to do is multiply from across

2*4 = 8 (numerator)

6 * 4 = 24 (denominator)

8/24