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egoroff_w [7]
3 years ago
7

(3x + 7)5 Simply the expression

Mathematics
2 answers:
babunello [35]3 years ago
8 0

Answer:

15x+35

Step-by-step explanation:

(3x + 7)5

Use 5 to open the bracket

3x \times 5 = 15x \\ 7 \times 5 = 35

15x + 35

alexdok [17]3 years ago
4 0

Answer:

3x+35

Step-by-step explanation:

the ( is a times, you times 7 by 5 and get 35. there is no other number that has a x with it so it stays by itself. You can only do something with the x number if there is another x number.

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Solve kx-2=7 for x. A. x=5/k B. x=9k C. x=9-k D. x=9/k ​
timurjin [86]

Answer:

the answer is D- 9/k

8 0
1 year ago
Read 2 more answers
Rewrite each series using sigma notation 405+406+407+408+409
wlad13 [49]
405+406+407+408+409=\boxed{\sum\limits_{n=405}^{409}n}
7 0
3 years ago
Note that WXYZ has vertices W(-1, 2), X(-5, 7), y(-1, -2), and Z (3, -7).
svp [43]

a. Slope of WZ = -2.25; Slope of WX = 5

b. WZ = √97; WX = √41

c. WXYZ is not a <em>rectangle, rhombus, nor a square</em>. We can conclude that: <em>D. WXYZ is none of these</em>.

<h3>Slope of a Segment</h3>

Slope = change in y/change in x

Given:

W(-1, 2), X(-5, 7), Y(-1, -2), and Z (3, -7)

a. Slope of WZ and slope of WX:

Slope of WZ = (-7 - 2)/(3 -(-1)) = -2.25

Slope of WX = (7 - 2)/(-1 -(-1)) = 5

b. Use distance formula, d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}, to find WZ and WX:

WZ = \sqrt{(3 - (-1))^2 + (-7 - 2)^2}\\\\\mathbf{WZ = \sqrt{97} }

WX = \sqrt{(-5 -(-1))^2 + (7 - 2)^2}\\\\\mathbf{WX = \sqrt{41} }

c. The quadrilateral WXYZ have adjacent sides that are not perpendicular to each other and have different slopes and different lengths, so therefore, WXYZ is not a rectangle, rhombus, nor a square. We can conclude that: <em>D. WXYZ is none of these</em>.

Learn more about slopes on:

brainly.com/question/3493733

5 0
2 years ago
WHERE DID CAROLYN MESS UP?
Anuta_ua [19.1K]

Answer:

line 2 of her working

Step-by-step explanation:

when multiplying the brackets out it is a negative times posative so she should have wrote -4 not +4

6 0
3 years ago
Pls help<br> First, correct answer will get brainliest
kozerog [31]

Answer:

A for the first one.

Second one, I'm not sure, but I'd guess it'd be A

Step-by-step explanation:

7 0
3 years ago
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