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3 years ago

Simplify the expression: (2x2 + 3x - 7) + (5x2 - x +9)

Mathematics

2 answers:

wolverine [178]3 years ago

7 0

Answer:

$7x^2 + 2x + 2$

Step-by-step explanation:

Step 1: Combine

$2x^2 + 3x - 7 + 5x^2 - x + 9$

$(2x^2 + 5x^2) + (3x - x) + (-7 + 9)$

$7x^2 + 2x + 2$

Answer: $7x^2 + 2x + 2$

Anvisha [2.4K]3 years ago

6 0

7x^2+2x+2 is the best answer

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Answer:

The answer will be D

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3 years ago

let f be a function such that f(x) = 3x - 2 is defined on the domain 1 is less than or equal to x is less than or equal to 9. th

Anastaziya [24]

Answer:

Range: [1,25]

Step-by-step explanation:

You may find it easier to express the domain in set notation rather than in words: [1,9], or 1 ≤ x ≤ 9. The smallest value of f(x) = 3x - 2 is at x = 1 and is 3(1) - 2, or 1. The lasrgest value of f(x) is at x = 9 and is 3(9) - 2, or 25.

Thus, the range of this function is [1,25] or 1 ≤ y ≤ 25.

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3 years ago

In order to apply the law of cosines to find the length of the side of a triangle, is it enough to know which of the following?

leva [86]

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Answer:

B. The lengths of two of the triangle's sides and the measure of the angle between them

Step-by-step explanation:

The usual formulation of the law of cosines is something like this:

c² = a² +b² -2ab·cos(C)

where 'c' is the side opposite angle C, and 'a' and 'b' are the other two sides. That is, to use this formula directly, one needs two side lengths and the measure of the included angle.

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Additional comment

One can use the law of cosines to solve a triangle when any two sides and one angle are known. The use of the formula will give a quadratic in the unknown side length, if it is not the side opposite the known angle. As with the law of sines, if the angle is opposite the shorter of the two given sides, there may be two solutions for the length of the third side.

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3 years ago

Five less than the product of 14 and carlos's age use the variable c to represent carlos's age

jarptica [38.1K]

" the product " means multiply

14c - 5 <== ur expression

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4 years ago

List the odd numbers between 2 and 20 in set notation. {1, 3, 5, 7, 9, 11, 13, 15, 17, 19} {2, 4, 6, 8, 10, 12, 14, 16, 18} {3,

Afina-wow [57]

Answer:

Even numbers can be divided evenly into groups of two. The number four can be divided into two groups of two.

Odd numbers can NOT be divided evenly into groups of two. The number five can be divided into two groups of two and one group of one.

Even numbers always end with a digit of 0, 2, 4, 6 or 8.

2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 are even numbers.

Odd numbers always end with a digit of 1, 3, 5, 7, or 9.

1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31 are odd numbers

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers