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Mademuasel [1]
3 years ago
13

The product of two numbers is -30, but their sum is -13. What are these two numbers?

Mathematics
2 answers:
inn [45]3 years ago
4 0

Answer:

2 & -15

Step-by-step explanation:

2 * -15 = -30

2 + (-15) = -13

Nata [24]3 years ago
3 0
<h3>Answer:  -15 and 2</h3>

You find this through trial and error.

A much more efficient way is to solve x^2-13x-30 = 0 using the quadratic formula. You'll find the two solutions to be x = 15 and x = -2

Going from those solutions, we get x-15 = 0 and x+2 = 0 which then turn into (x-15)(x+2) = 0 through the zero product property.

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The number of eggs in the refrigerator e decreased by 9 equals 17.
alexandr402 [8]

Answer:

x-9=17

Step-by-step explanation:

x=eggs in the fridge

5 0
3 years ago
Find the 4th term of the expansion of (a - sqrt(2)) ^ 8
charle [14.2K]

Answer:

Applying the binomial theorem

{\displaystyle (x+a)^{n}=\sum _{k=0}^{n}{n \choose k}x^{n-k}a^{k}}

Here we have x = -\sqrt{2}, n = 8,

=> 4th term (k = 3) would be:

{8 \choose 3}x^{8-3}a^{3}} = {8 \choose 3}(-\sqrt{2})^{5}a^{3}} = -224a^{3}\sqrt{2}

Hope this helps!

:)

6 0
3 years ago
Read 2 more answers
Ages Number of students
lions [1.4K]

The relative frequency for the class with lower class limit 31 is 8.57%.

<h3>How to calculate the frequency?</h3>

It should be noted that the lowrr class frequency is 31 in this case.

Therefore, the relative frequency for the class with lower class limit 31 will be:

= 3/(6+4+4+9+3+9) × 100

= 3/35 × 100

= 8.57%

Therefore, the relative frequency for the class with lower class limit 31 is 8.57%.

Learn more about frequency on:

brainly.com/question/254161

#SPJ1

7 0
1 year ago
What is the value of the following expression?
monitta

The expression (−81)(−9)  will give the value of 729.

<u>Step-by-step explanation:</u>

The given expression is (−81)(−9) .

The both numbers in the expression are negative numbers and they are given inside the brackets.

This means that, the negative numbers must be multiplied to get a final value.

<u>The rules in multiplication are :</u>

  • Positive number × Positive number = positive number
  • Negative number × Positive number = negative number
  • Positive number × Negative number = negative number
  • Negative number × Negative number = positive number

From the rules, it can be determined that the result of any two negative numbers will be a positive number.

So, eliminate option A) and B) because they have negative sign.

The expression (−81)(−9) = -81 × -9

⇒ 729.

Therefore, the option C) and D) are not in match with 729. None of the options are not the value of the given expression (−81)(−9).

6 0
3 years ago
Is 3x+4y a polynomial. is it is a polynomial, state the degree of the polynomial.
Svetlanka [38]

Yes, this is a polynomial. It is an expression containing variables raised to a real number.

In this case, the variables are being raised to the power of one.

The degree of this polynomial, thus, is one.

5 0
3 years ago
Read 2 more answers
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