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KIM [24]
2 years ago
10

What are 3 expressions of 3/4x=15

Mathematics
1 answer:
Over [174]2 years ago
7 0

Answer:

X=20

Step-by-step explanation:

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One of Marianna's homework problems was to solve the equation below.
Strike441 [17]

Answer:

<h2>Marianna is incorrect because x2</h2><h2>2x13 can be factored into two binomials</h2>

Step-by-step explanation:

ax^2+bx+c = 0

x=−1+√14 or x=−1−√14

discriminant=56

completing square x=−1+√14 or x=−1−√14

Now, we can solve each term for  

x=-2 she is incorrect

x(x+2)=0

Now, we can solve each term for  

0:  

x=0

- no other work needed,

and

x+2=0

x+2-2=0-2

x+0=-2

<u>x=-2</u>

<h3>Brainliest please!</h3>

3 0
3 years ago
What is the value of<br> 3x² + 2y3<br> when x = -4 and y = -2
skad [1K]
Ummmmmmm -26 ......... in
7 0
3 years ago
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3 coffees and 4 donuts cost $10.05. In the same cafeteria, 5 coffees and 7 donuts cost $17.15. How much do you have to pay for 4
MakcuM [25]

Answer

You need to pay $14.20 to get 4 coffees and 6 donuts.

Explanation

Let's say that the price of one coffee and x and the price of one donut is y.

In the first instance, 3x+4y=10.05.

In the second instance, 5x+7y=17.15.

You can use these equations to find the value of a coffee and the value of a donut.

We can find x and y using elimination. To do this, you should add or subtract one equation from another to "get rid" of a variable (I'll "get rid" of x). We can't just add or subtract the equations right now, since that wouldn't lead to 0x.

Multiply the first equation by 5, and the second equation by 3. After this, both equations will have 15x. Make sure to multiply each term by 5 and 3.

15x+20y=50.25. This means that 15 coffees and 20 donuts is $50.25.

15x+21y=51.45. This means that 15 coffees and 21 donuts is 51.45.

Now since there are an equal number of coffees, we can subtract these equations.

(15x+21y=51.45)-(15x+20y=50.25) equals y=1.20 (a donut costs $1.20).

Plug the price of the donut into y to find x; 3x+4(1.20)=10.05. The value of x is 1.75. The price of a coffee is 1.75.

You can multiply 1.75 by 4 to find the price of 4 coffees and 1.20 by 6 to find the price of 6 donuts.

1.75*4 is 7.00 and 1.20*6 is 7.20.

You can add those to find the total price; 7.00+7.20=14.20.

5 0
3 years ago
PLEASE HELP!!! ILL GIVE AS MANY POINTS AS YOU WANT!!! PLEASE!!
lozanna [386]

1: y=8, (-2,8)

2: y=6, (-1,6)

3: y=0, (2,0)

Step-by-step explanation:

Insert the x value into each equation then see what value of y that you need to get 4 on the right hand side of the equation.

6 0
3 years ago
The value 0.1 meter is equivalent to 1 ____.
r-ruslan [8.4K]

Answer:

centimeters I think so

4 0
3 years ago
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