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Mrac [35]
3 years ago
12

Need to know NOW!!!!!! 15 points!

Mathematics
1 answer:
Oxana [17]3 years ago
7 0

Answer:

4/10

Step-by-step explanation:

1/2 - 1/10

We need to get a common denominator of 10

1/2 * 5/5 = 5/10

Replace 1/2 with 5/10

5/10 - 1/10

4/10

This simplifies by dividing the top and bottom by 2

4/2 =2

10/2 = 5

2/5

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Determine the number and types of solutions for<br><br> 6m^2-3m-4=0
Anna11 [10]

Answer:

2 real solutions

Step-by-step explanation:

Remember this messy thing?

x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

The <em>quadratic formula</em>, as it's called, gives us the roots to any quadratic equation in standard form (ax² + bx + c = 0). The information on the <em>type</em> of roots is contained entirely in that bit under the square root symbol (b² - 4ac), called the <em>discriminant</em>. If it's non-negative, we'll have <em>real</em> roots, if it's negative, we'll have <em>complex roots</em>.

For our equation, we have a discrimant of (-3)² - 4(6)(-4) = 9 + 96 = 105, which is non-negative, so we'll have real solutions, and since quadratics are degree 2, we'll have exactly 2 real solutions.

4 0
3 years ago
PLEASE HELP BEST ANSWER WILL GET BRAINLIEST
Alina [70]

Answer: Expression I & Expression II

Step-by-step explanation:

2n+n+3n+5 simplifies to 6n+5

8 0
3 years ago
What is y-value when x equals -12? y =-200 - 6(x)
Arada [10]
Hi,

Solving:

x = - 12 \\ y = - 200 - 6( x) \\ y = - 200 - 6( - 12) \\ y = - 200 + 72 = \underline{ \underline{ - 128}}

Answer: y = -128

Hope this helps.
If you have any questions about the answer, comment below and I'll reply.
r3t40
7 1
3 years ago
Can you please help me!!
Molodets [167]
A is more because 1/4 is equal to 2/8 and 2/8 is less than 7/8 so you would have more than a minute
B is three minutes 2/8 goes into 7/8 three times
8 0
3 years ago
The scale of a model train is 1 inch to 13.5 ft. One of the cars of the model train is 5inches long. What is the length in feet
aleksklad [387]

Answer:

The length of the actual train's car is <u>67.5 feet.</u>

Step-by-step explanation:

Given:

The scale of a model train is 1 inch to 13.5 ft.

Now, to get the length of the actual car of the train.

Let the length of actual train's car be x.

And, the length of the car of model train = 5\ inches\ long.

<em>According to the scale of the model train, 1 inch is equivalent to 13.5 ft. </em>

<em>Thus, 5 inches is equivalent to </em>x.<em />

Now, to get the length of actual train's car using cross multiplication method:

\frac{1}{13.5} =\frac{5}{x}

By cross multiplying we get:

x=67.5\ feet.

Therefore, the length of the actual train's car is 67.5 feet.

7 0
3 years ago
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