What are two values for √81

Mathematics

1 answer:

Molodets [167]3 years ago

5 0

9 or -9 because if -9 is squared the negative cancels

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Pls help help help help

laiz [17]

K= 13t-2
= 13(2)-2
=26-2
K=24

6 0

2 years ago

PLEASE HELP I WILL AWARD BRAINLIEST

lyudmila [28]

By the table, it seems to be that f = 1/2x

3 0

2 years ago

Cant seem to solve this problem, help needed.

Georgia [21]

Answer:

Step-by-step explanation:

3 0

2 years ago

Based on one of the Triangle Congruence Postulates, the two triangles are shown are congruent

tankabanditka [31]

Answer:

true

Step-by-step explanation:

all the sides match up. One side (the base) is shared which means they are the same length. The triangle at the top has a single hash on a side and so does the bottom one. This means they are the same length. The same thing occurs with the last remaining sides, they are congruent because they both have two hash lines. Since all three sides of both triangle add up, the triangles ARE CONGRUENT.

3 0

2 years ago

. Using the Binomial Theorem explicitly, give the 15th term in the expansion of (-2x + 1)^19

timofeeve [1]

Let's rewrite the binomial as:
$(1 - 2x)^{19}$

$\text{Binomial expansion:} (1 + x)^{n} = \sum_{r = 0}^n\left(\begin{array}{ccc}n\\r\end{array}\right) (x)^{r}$

Using the binomial expansion, we get:
$\text{Binomial expansion: } (1 - 2x)^{19} = \sum_{r = 0}^{19}\left(\begin{array}{ccc}19\\r\end{array}\right) (-2x)^{r}$

For the 15th term, we want the term where r is equal to 14, because of the fact that the first term starts when r = 0. Thus, for the 15th term, we need to include the 0th or the first term of the binomial expansion.

Thus, the fifteenth term is:
$\text{Binomial expansion (15th term):} \left(\begin{array}{ccc}19\\14\end{array}\right) (-2x)^{14}$

3 0

3 years ago