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4 years ago

12

Nancy had 165 bear stickers Nancy gave 65 stickers to Fred 36 stickers to her sister and an additional 42 stickers to Jess how m

any stickers does Nancy have?

1 answer:

Vanyuwa [196]4 years ago

7 0

65+36+42=143 165-143=22 Nancy had 22 stickers

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Given the following matrices, what 3 elements make up the first column of the product matrix DA?

Misha Larkins [42]

We have to figure out what the product of DA is,

$\begin{bmatrix}-1&2&3\\8&-4&0\\6&7&1\\ \end{bmatrix}\begin{bmatrix}1\\3\\5\\ \end{bmatrix}=\begin{bmatrix}a\\b\\c\\ \end{bmatrix}$

We know that,

$\begin{bmatrix}a&b&c\\d&e&f\\g&h&i\\\end{bmatrix}\begin{bmatrix}x\\y\\z\\\end{bmatrix}=\begin{bmatrix}ax+by+cz\\dx+ey+fz\\gx+hy+iz\\\end{bmatrix}$

So,

$a=-1\cdot1+2\cdot3+3\cdot5=-1+6+15=20$

$b=8\cdot1+(-4)\cdot3+0\cdot5=8-12=-4$

$c=6\cdot1+7\cdot3+1\cdot5=6+21+5=32$

So the solution is,

$a,b,c=\boxed{20,-4,32}$

Hope this helps :)

4 0

3 years ago

A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n?

tekilochka [14]

Sum of two sides of the triangle should be more than 3d side.
n<20+5,
n<25

Third side should be more than difference of two other sides.
n> 20-15
n>5

So, n should be
5<n<25.

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4 years ago

Read 2 more answers

What is the approximate value of tan C?<br> B<br> 13.93<br> 5<br> 13

Ivahew [28]

Answer:

B you need to plug it in the calculator

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4 years ago

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Mariulka [41]

Answer:

y=x+2

Step-by-step explanation:

In this picture ( step by step )

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3 years ago

(x + 3)^2 = 12 ? need answers ASAP

blsea [12.9K]

Answer:

option c is the correct answer

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3 years ago