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MrRa [10]
3 years ago
7

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Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
7 0
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From the sum of polynomials 3a2−ab−2b2 and 2a2+5ab−3b2 subtract polynomial a2−3ab−4b2.
malfutka [58]

Answer:

4a^2+7ab-b^2

Step-by-step explanation:

First, we will sum

3a^2-ab-2b^2

and

2a^2+5ab-3b^2

Then, from that sum, we will SUBTRACT  a^2-3ab-4b^2

First, lets take the sum by combining like terms:

(3a^2-ab-2b^2)+(2a^2+5ab-3b^2)=5a^2+4ab-5b^2

Now, lets do the subtraction:

(5a^2+4ab-5b^2)-(a^2-3ab-4b^2)\\=5a^2+4ab-5b^2-a^2+3ab+4b^2\\=4a^2+7ab-b^2

This is the answer.

3 0
3 years ago
On a piece of paper, use a protractor to construct a triangle with angle measures of 20° and 30°.
Andrew [12]

Answer:

option 2, 4, and 5 are correct.

Step-by-step explanation:

180 - (20+30) = 180 - 50 = 130

Obtuse triangle is a triangle that has one angle that is more than 90 degrees and all the sides have different lengths since all the angles are different.

5 0
3 years ago
Read 2 more answers
A can of favorite dog food holds 14 oz. Four cans are $1.00. The price of three cans of delight beef dog food, each containing 1
myrzilka [38]

The 12 ounce can, because it only costs $.58 for 36 ounces, which means each ounce costs $.016, whereas the 14.5 ounce cans cost $1.00 for 58 ounces, which means each ounce costs $.017.

5 0
3 years ago
A study will be conducted to investigate whether there is a difference in the mean weights between two populations of raccoons.
enyata [817]

Answer:

<h2>In this case,the answer would be option d) given in the answer choices or options or  A two-sample t-test for a difference between population means.</h2>

Step-by-step explanation:

  • In Statistics,a two sample test is generally used to examine or compare two different population means with the main objective to verify whether the population means are equal or otherwise.
  • The two sample t-test basically involves the hypothesis testing to determine or verify the equality between two concerned population means.
  • In this case,the two different populations of raccoons are given and the equality of the mean sample weights of the two distinct populations can be determined or evaluated by employing the hypothesis testing method under a two sample t test for measuring difference in two population means.
5 0
3 years ago
∠1 and ∠2 are supplementary and ∠1 ≅ ∠2. Which one of these statements will always be true?
mote1985 [20]
Since angles 1 and 2 are supplementary, then we know they add to equal 180°. We also know that both angles are congruent. By the given information, we can find that both angles 1 and 2 are right angles. This is because 180/2=90 and a 90° angle is better known as a right angle. That is the only statement that will always be true with the given information. Angles don't have to be adjacent for them to be supplementary, we don't know the location of the angles, so they might be vertical angles, but that might not always be true, and it says the angles are supplementary, so they couldn't be complimentary.
6 0
4 years ago
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