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kogti [31]
3 years ago
7

3. HELPPP asaaaaaapppppp

Mathematics
1 answer:
mars1129 [50]3 years ago
3 0

Answer:

\left[\begin{array}{ccc}7\\4\\2\end{array}\right]

Step-by-step explanation:

To find the product of two matrices we need to multiply the elements of each row of the first matrix by the elements of each column in the second matrix. Then we should add the products. Then:

\left[\begin{array}{ccc}3&6&1\\2&4&0\\0&6&2\end{array}\right] \\ × \left[\begin{array}{ccc}2\\0\\1\end{array}\right] = \left[\begin{array}{ccc}3x2+6x0+1x1\\2x2+4x0+0x1\\0x2+6x0+2x1\end{array}\right]  = \left[\begin{array}{ccc}7\\4\\2\end{array}\right]

The term "x" refers to the multiplication sign.

Then, the solution is \left[\begin{array}{ccc}7\\4\\2\end{array}\right]

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I really need help rn T_T plz help me out!
pshichka [43]

Answers:

  • The lengths of sides PQ and RS are <u>   13   </u>
  • The lengths of sides QR and SP are <u>   </u><u>20  </u>

This is a 13 by 20 rectangle.

============================================================

Explanation:

Refer to the drawing below.

Let x be the length of side SP. Since we're dealing with a rectangle, the opposite side is the same length. Side QR is also x units long.

We're told that RS = SP - 7 which is the same as saying RS = x-7

We also know that PQ = x-7 as well because PQ is opposite side RS.

In short, we have these four sides in terms of x

  • PQ = x-7
  • QR = x
  • RS = x-7
  • SP = x

as shown in the drawing. The four sides add up to the perimeter of 66.

PQ+QR+RS+SP = perimeter

PQ+QR+RS+SP = 66

(x-7)+x+(x-7)+x = 66

4x-14 = 66

4x = 66+14

4x = 80

x = 80/4

x = 20

Use this x value to find the unknown side lengths.

  • PQ = x-7 = 20-7 = 13
  • QR = x = 20
  • RS = x-7 = 20-7 = 13
  • SP = x = 20

In short, this is a 13 by 20 rectangle.

-----------------

Check:

perimeter = side1+side2+side3+side4

perimeter = PQ+QR+RS+SP

perimeter = 13+20+13+20

perimeter = 33+33

perimeter = 66

The answer is confirmed.

4 0
2 years ago
Josh drew ∆ ABC with mm∠A = 40°, m∠B = 60° and m∠ C = 80°. Howard drew ∆ XYZ with m∠Y = 60° and m∠ Z = 80°. What can you say abo
aliya0001 [1]

Answer:

Both of these triangles are congruent.

Step-by-step explanation:

All 3 angle measures of both of the triangles are equivalent and correlate to each other. This makes the triangles congruent.

7 0
3 years ago
The circumference of a circle is 12π cm. Find its diameter, in centimeters.
inessss [21]

Hope this helped you answer your question! Bye bye

4 0
3 years ago
Read 2 more answers
Need answer for this ratios question
Tom [10]

Answer: 4:1

Step-by-step explanation: I think the answer is 4:1. I think this because 20% of 2500, would be 500. So 2500-500=2000. So the ratio would be 2000:500. Then we simplify 2000:500, by dividing 2000 by 500, and dividing 500 by 500. 500 / 500 = 1. 2000 / 500 = 4, so the answer is 4:1. (I am sorry if I am incorrect)

7 0
2 years ago
When plants that are heterozygous for seed shape and have round seeds are crossed, what is the probability that the offspring wi
Crazy boy [7]

Hey! Sorry for the 6 day late response. The answer is:

25%

4 0
3 years ago
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