I have a hard time understanding this question

Mathematics

1 answer:

Alex73 [517]3 years ago

8 0

Answer:

22m+42 is the answer

Step-by-step explanation:

All you have to do is simplify and add the common factors.

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Identify the properties used in Step 1 and Step 2 to solve the equation shown. Then discuss why those properties were used. Prob

Alex Ar [27]

<h3>Step-by-step explanation:</h3>

<u>Step</u> <u>Property</u>

2x+6 = 22 given

2x = 16 addition property of equality (-6 added to both sides)

x = 8 multiplication property of equality (both sides × 1/2)

_____

In general equations are solved by reversing the steps done to the variable. Here, the variable (x) is multiplied by 2 and 6 is added to that product. So, to find x, we undo the addition of 6 (by adding -6, the additive inverse), and undo the multiplication by 2 (by multiplying by 1/2, the multiplicative inverse).

If other functions were performed on the variable in the original equation, their inverse functions would be used, too, as part of the solution process.

7 0

3 years ago

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A third-grade class is told to send a valentine to every single one of their classmates. On Valentine’s Day, the class ends up w

FinnZ [79.3K]

306 is the total cards sent by all the students in the class. Lets say x is the number of students in class, therefore each student needs to send x-1 cards (since they do not send themselves a card). So depending on your level of math, you could either take the complex way to solve it using quadratic equations, or just find the number that if multiplied by itself then subtracted, gives you 306.
$(x \times x) - x = 306 \\ lets \: try \: 18 \\ (18 \times 18) - 18 = 306 \\ so \: x = 18$
===============
Complex way
$(x \times x) - x = 306 \\ {x}^{2} - x - 306 = 0$
So a = 1, b = -1, c=-306
using the quadratic equation:
$x = \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a}$
$x = \frac{1 + \sqrt{1 - (4 \times 1 \times - 306)} }{2} \\ x = \frac{1 + \sqrt{1 - ( - 1224)} }{2} \\ x = \frac{1 + \sqrt{1225} }{2} \\ x = \frac{1 + 35}{2} \\ x = \frac{36}{2} \\ x = 18$

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3 years ago

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At a restaurant the cost for one breakfast taco and one glass of milk is $3.94. The cost for 2 tacos and 3 glasses of milk is $8

umka21 [38]

Answer:let 't' represent the cost of a taco and 'm' represent the cost of a glass of milk

Step-by-step explanation:2.10 = t + m

5.15 = 2t + 3m

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3 years ago

When 9^2/3 is written in simplest radicsl form, which value remains under the radical? 3 6 9 27

finlep [7]

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