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algol [13]
3 years ago
12

The difference between 7 times a number and 5 is 51 which of the following equations below can be used to find the unknown numbe

r
A.) 7x - 5x = 51

B.)7x + 5 = 51

C.) 7x - 5 = 51

D.) 7x * 5 = 51
Mathematics
2 answers:
Nataly [62]3 years ago
4 0
Here are some helpful word problem terms:

x= a number

times= multiplication

7 times a number= 7x

difference= subtraction

difference between 7 times a number and 5= 7x - 5

is= equal sign


ANSWER: (C) 7x - 5= 51 is the answer because 5 was not multiplied by the number (x) too.

Hope this helps! :)
Sloan [31]3 years ago
3 0
C, I think

difference(subtract) between 7 times a number(7 multiplied by a unknown number) AND 5(other number to subtractoon is(= to) 51
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Which of the following equations describe the line shown below? <br><br>Check all that apply.
WITCHER [35]
Here, first we need to calculate the slope of the line, 
Here, Coordinates = (-6, 2) (-1, -4)
m = y2 - y1 / x2-x1
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Now, Take first coordinate: y - 2 = -6/5 (x + 6)
Second coordinate: y + 4 = -6/5 (x + 1)

In short, Your Answers would be Option C & D

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3 years ago
Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule. A(n)=-6+(n-1)(1/5) A)-6,-5 1/5,
scoundrel [369]

Step-by-step explanation:

An arithmetic sequence is given by relation as follows :

A(n)=-6+(n-1)\dfrac{1}{5}

For the first term, put n = 1. So,

A(1)=-6+(1-1)\dfrac{1}{5}\\\\A(1)=-6

For fourth term, put n = 4. So,

A(4)=-6+(4-1)\dfrac{1}{5}\\\\A(4)=\dfrac{-27}{5}\\\\A(4)=-5\dfrac{2}{5}

For tenth term, put n = 10. So,

A(10)=-6+(10-1)\dfrac{1}{5}\\\\A(10)=-6+\dfrac{9}{5}\\\\A(10)=\dfrac{-21}{5}\\\\A(10)=-4\dfrac{1}{5}

Hence, the correct option is (C).

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3 years ago
Calculate the area of triangle ABC with altitude BD, given A (−6, 0), B (0, 0), C (0, 6), and D (−3, 3).
nata0808 [166]

Answer:

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Step-by-step explanation:

If BD is altitude then AC is the base.

<u>The length of AC is:</u>

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<u>The length of BD is:</u>

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<u>The area is:</u>

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