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Vesna [10]
3 years ago
14

Use algebraic rules of equations to predict the solution to the system of equations. Include all of your work for full credit.

Mathematics
1 answer:
bezimeni [28]3 years ago
7 0
Use substitution
x+(2x-1)=-4
3x-1=-4
3x=-3
x=-1
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A family of 3 goes to a fair. Tickets cost $5 each, but
Klio2033 [76]

Answer: $105

Step-by-step explanation:

7 0
3 years ago
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What is an equation of a circle with center (2, -1) that passes through the point (3, 4)?
Svet_ta [14]

Answer:

<em>(x - 2)^2 + (y + 1)^2 =  26</em>

Step-by-step explanation:

A circle with center O(2, -1) that passes through the point A(3, 4).

=> The radius of this circle is OA which could be calculated by:

OA = sqrt[(3 - 2)^2 + (4 - (-1))^2] = sqrt[1^2 + 5^2] = sqrt[26]

The equation of a circle with center O(a, b) and radius r could be written as:

(x - a)^2 + (y - b)^2 = r^2

=> The equation of circle O above with center O(2, -1) and radius = sqrt(26) is shown as:

    (x - 2)^2 + (y - (-1))^2 = (sqrt(26))^2

<=>(x - 2)^2 + (y + 1)^2 = 26

Hope this helps!

4 0
3 years ago
Read 2 more answers
Adelaide paid $35 for a manicure and gave the manicurist a 20% tip How much money did Adelaide give her manicurist
seropon [69]
<span><u><em>The correct answer is:</em></u>
$42.

<u><em>Explanation:</em></u>
The best way to find a total bill including tip (or tax if that is what you are looking for - it is found the same way), is to multiply the original total by 1 + the percentage of the tip.

Since the percentage is 20%, we add 0.20 to 1 to get 1.20.
Now we multiply that by the original cost to get the final answer.
1.20*35 = 42</span>
3 0
3 years ago
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What is the probability that the product of two dice is greater than<br> 15 on two separate rolls?
ratelena [41]

Answer:

25/324

Step-by-step explanation:

Make a table of possible products:

\left[\begin{array}{ccccccc}&1&2&3&4&5&6\\1&1&2&3&4&5&6\\2&2&4&6&8&10&12\\3&3&6&9&12&15&18\\4&4&8&12&16&20&24\\5&5&10&15&20&25&30\\6&6&12&18&24&30&36\end{array}\right]

Of the 36 results, 10 are greater than 15.

The probability the product is greater than 15 on a single roll is 10/36 = 5/18.

The probability the product is greater than 15 on two rolls is (5/18)² = 25/324.

4 0
3 years ago
How would you solve 4(y – 3y) – 19 = 32
Fittoniya [83]

Answer:

<u>y = - 6.375</u>

Step-by-step explanation:

Step 1:

4 ( y - 3y ) - 19 = 32        Equation

Step 2:

4y - 12y - 19 = 32         Multiply

Step 3:

- 8y - 19 = 32         Combine Like Terms

Step 4:

- 8y = 51        Add 19 on both sides

Step 5:

y = 51 ÷ - 8         Divide

Answer:

<u>y = - 6.375</u>

Hope This Helps :)

6 0
3 years ago
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