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3 years ago

Please expand it (c-7d)2

Mathematics

1 answer:

asambeis [7]3 years ago

8 0

Answer:

c² - 14cd + 49d²

Step-by-step explanation:

Given

(c - 7d)²

= (c - 7d)(c - 7d)

Each term in the second factor is multiplied by each term in the first factor, that is

c(c - 7d) - 7d(c - 7d) ← distribute both parenthesis

= c² - 7cd - 7cd + 49d² ← collect like terms

= c² - 14cd + 49d²

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Two consecutive numbers whose squares differ by 25

yaroslaw [1]

An example of this might be 7 and 8. 7 multiplied by 7 to find the square root is 59, and 8 multiplied by 8 to find the square root is 64. 64 subtract 49 equals 25, so there you have your answer.

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4 years ago

What is the remainder when (3x3 – 2x2 4x – 3) is divided by (x2 3x 3)? 30 3x – 11 28x – 36 28x 30

kondor19780726 [428]

The answer would be 28x+30.

You can do this by doing long division.

Refer to the attachment please.

The final quotient will then be 3x - 11 remainder 28x + 30

8 0

3 years ago

Read 2 more answers

I need help making a coordinate proof and it starts with if a quadralateral, then its diagnoles are perpendicular.

zlopas [31]

Answer:

There are a number of ways to show whether a quadrilateral placed on a coordinate plane is a parallelogram or not. Here are a few ways:

1. Show that both pairs of opposite sides are congruent.

2. Show that both pairs of opposite sides are parallel

3. Show that a pair of opposite sides are congruent and parallel

4. Show that the diagonals bisect each other.

In this activity, we will use the Distance, Midpoint and Slope Formulas that we learned in Algebra 1 to show congruent, bisected and parallel segments.

Midpoint, Slope and Distance Formula Review.

The midpoint of a segment in the coordinate plane with endpoints

Step-by-step explanation:

8 0

3 years ago

Plz help its due tonight thanks a lot

kicyunya [14]

$x + y = 14 \\ 340x + 1030y = 8210$
$x = 14 - y$
Substitute into
$340(14 - y) + 1030y = 8210 \\ 4760 - 340y + 1030y = 8210 \\ 690y = 3450 \\ y = 5$
Insert y = 5 into
$x = 14 - 5 \\ x = 9$
Answer: 9 coach tickets, 5 first class tickets.

Hope this helps.

7 0

4 years ago

PLEASE HELP!! WILL GIVE BRAINLIEST!!!

Murrr4er [49]

Answer:

option D

Step-by-step explanation:

Jerry solved this equation:

$3(x-\frac{1}{4})=\frac{13}{6}$