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N76 [4]
3 years ago
9

A fraction thar has a variable or variable expression in its numerator it's denominator or both

Mathematics
2 answers:
Nikolay [14]3 years ago
6 0
IT is a rational expresstion
MrMuchimi3 years ago
5 0
Ya it's a Rational Expression.
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Ganezh [65]

Answer:

40

Step-by-step explanation:

2 x -4 x -5 = 2 x 20 = <u>40</u>

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3 years ago
Can anyone help please
Akimi4 [234]

Answer: X = 27

Step-by-step explanation: If we observe very closely, we have two similar triangles in the diagram. The first one is ABC and the other triangle is EDC. Also take note that angle ACB in the first triangle is equal in measurement to angle ECD (45 degrees) in the other triangle, (Opposite angles).

Hence in triangle ECD, we have identified two angles so far which are angle 2x + 10 and angle 45. Same applies to triangle ABC, we already have two angles which are, 3x - 10 and 45.

However angle D in the second triangle is equal in measurement to angle B in the first triangle

(Alternate angles).

Hence we have a third angle in triangle ABC which is

Angle B = 2x + 10.

Therefore 3x - 10 + (2x + 10) + 45 = 180

(Sum of angles in a triangle)

3x - 10 + 2x + 10 + 45 = 180

By collecting like terms we now have

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Divide both sides by 5,

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8 0
3 years ago
How do you round numbers
Mariulka [41]
Step 1: Circle the place value of the digit to be rounded. This is the rounding digit. Step 2: Look to the neighboring digit on the right. Step 3: a) If the neighboring digit is less than five (0 - 4), keep the rounding digit the same.
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Suppose the test scores of students in a class are normally distributed with a mean of 86 and a standard deviation of 4. What is
WARRIOR [948]

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-2.5

Step-by-step explanation:

Here in this question, we are interested in calculating the z-score for a student that had a particular mark at the test

To calculate the z-score, we need to use a mathematical formula

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z-score = (x - mean)/SD

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Plugging these values in the equation, we have;

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