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2 years ago

Select the three equations that have

Mathematics

2 answers:

MakcuM [25]2 years ago

3 0

Answer:y+2.9=11, 2y+1=17.2, 28.4-y=20.3

Step-by-step explanation:

disa [49]2 years ago

3 0

Answer:

Select all of the equations that have y=8.1 as the solution. Mark all that apply.

y+2.9=11

12-y=8.1

2y+1=17.2

9+7.2-y=8.2

28.4-y=20.3

Step-by-step explanation:

Select all of the equations that have y=8.1 as the solution. Mark all that apply.

y+2.9=11

12-y=8.1

2y+1=17.2

9+7.2-y=8.2

28.4-y=20.3

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Can you help me with this math problem and tell me how to do it?

Gemiola [76]

Let the number of songs Lou has = X

Kelly has 4 times as many as Lou, which would be written as 4X

Tiffany has 6 times as many songs as Lou, which would be written as 6X

The total number of songs = 682

You need to add all three people together to equal 682

So you would get:

X + 4X + 6X = 682 songs.

Combine all like terms ( 6x + 4x + X = 11x)

11x = 682

Now to solve for X divide both sides by 11:

x = 682 / 11 = 62

Lou = x = 62 songs.

Kelly = 4x = 4(62) = 4*62 = 248 songs.

Tiffany = 6x = 6(62) = 6 *62 = 372 songs.

7 0

3 years ago

If a coin is tossed three times, the likelihood of obtaining three heads in a row is

morpeh [17]

3/6
3=heads in a row
2=head and tails
3=times tossed
3/3*2
3/6 or 1/2

5 0

3 years ago

HELP ME PLEASE!!<br> is y=2x^2 - 4 linear or non linear

OleMash [197]

Answer:

non-linear

Step-by-step explanation:

Linear functions can only have powers of 1 for the x and y terms and the terms must not be multiplied.

The function y =2x^2-4 has a power of 2 on the x so it is not linear. It is parabolic.

6 0

3 years ago

What value of y satisfies the system of equations below?<br> 2x - y = 6<br> 2x + 3y = 14

Oksana_A [137]

Answer: y=2

Step-by-step explanation:

2x+3y=14 - 2x-y=6 = 4y=8

y=2

If you need x, just insert y into the equation and work out x from there

2x-2=6

2x=8

x=4

5 0

2 years ago

The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May it cost her $420 to drive 500 mi

djyliett [7]

Answer:

$C(d) = \frac{1}{5}d + 320$

Step-by-step explanation:

Given

$d \to miles$

$C \to cost$

So:

$(d_1,C_1) = (500,420)$ --- May

$(d_2,C_2) = (620,444)$ --- June

Required

Express as a function

Start by calculating the slope (m)

$m = \frac{\triangle C}{\triangle d}$

$m = \frac{444-420}{620-500}$

$m = \frac{24}{120}$

Simplify

$m = \frac{1}{5}$

The equation is:

$C(d) = m(d - d_1) +C_1$

$C(d) = \frac{1}{5}(d - 500) +420$

$C(d) = \frac{1}{5}d - 100 +420$

Take LCM

$C(d) = \frac{1}{5}d + 320$

6 0

2 years ago