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harina [27]
3 years ago
7

Pam likes to practice dancing while preparing for a math tournament. She spends 80 minutes every day practicing dance and math.

To help her concentrate better, she dances for 20 minutes longer than she works on math.
Write a pair of linear equations to show the relationship between the number of minutes Pam practices math every day (x) and the number of minutes she dances every day (y). (5 points)
Mathematics
1 answer:
RSB [31]3 years ago
7 0

Answer: 628

Step-by-step explanation:

I found it online

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Trevor is analyzing a circle, y2 + x2 = 100, and a linear function g(x). Will they intersect?
lakkis [162]
Given a circle described by the equation:
y^2+x^2=100
and a function g(x) given by the table
\begin{center}
\begin{tabular}{ |c |c |c }
 x & g(x) \\
 -1 & -22 \\
 0 & -20  \\
1 & -18   
\end{tabular}
\end{center}

The function g(x) describes a straight line with the equation:
\frac{y-y_1}{x-x_1} = \frac{y_2-y_1}{x_2-x_1}  \\  \\  \frac{y-(-22)}{x-(-1)} = \frac{-20-(-22)}{0-(-1)}  \\  \\ \frac{y+22}{x+1} = \frac{-20+22}{0+1} = \frac{2}{1}  \\  \\ y+22=2(x+1)=2x+2 \\  \\ y=2x-20

To check if the circle and the line intersects, we substitute the equation of the line into the equation of the circle to see if we have a real solution.
i.e.
y^2+x^2=100 \\  \\ (2x-20)^2+x^2=100 \\  \\ 4x^2-80x+400+x^2=100 \\  \\ 5x^2-80x+300=0 \\  \\ x^2-16x+60=0 \\  \\ (x-6)(x-10)=0 \\  \\ x-6=0 \ or \ x-10=0 \\  \\ x=6 \ or \ x=10

When x = 6, y = 2(6) - 20 = 12 - 20 = -8 and when x = 10, y = 2(10) - 20 = 20 - 20 = 0

Therefore, the circle and the line intersect at the points (6, -8) and (10, 0).
8 0
4 years ago
Read 2 more answers
Find the area of the following figure:<br><br><br> Please answer I’ll give Brainly
mart [117]

Answer:

138 square centimeters

Step-by-step explanation:

You can find the area by splitting up the shape into pieces and adding it all together, and you get 138 square centimeters.

5 0
3 years ago
Can someone help me with this
trasher [3.6K]

Answer:

Angle 3 is 65°, Angle 8 is 115°

Step-by-step explanation:

Angle 3 and 1- Linear Pair

Angle 8 and 1- Alternate Exterior

7 0
3 years ago
1. Ann took out a loan at the Bank of Florida with a principle amount of $12,000, at an interest rate of 5.65% for 4 years. What
fredd [130]

Answer:

1. $2,950.62

2. $93.75

Step-by-step explanation:

Ann took out a loan of = $12,000

At an interest rate of = 5.65%

Time = 4 years

Formula of compound interest = A=P(1+\frac{r}{n})^{nt}

= A=12,000(1+\frac{0.0565}{1})^{1\times 4}

= 12,000(1.0565)^{4}

= 12,000 × 1.24588514

Interest = Amount - principal amount

             = $14,950.62 - 12,000

            = $2,950.62

Amount that Dan borrowed =  $1,250

rate of interest = 5%

Time = 18 months or 1.5 years

Formula of simple interest = P(1+rt)

= 1250(1+(0.05 × 1.5))

= 1250(1+0.075)

= 1250 × 1.075

= 1343.75

Interest = Amount - principal

I = 1343.75 - 1250

 = $93.75

8 0
3 years ago
What is the midpoint of Line Segment AB, when A(7, 3) and B(7, -7)?
Hatshy [7]

Answer:

(7, -2)

Step-by-step explanation:

Add the points together and divide them by 2:

A+B/2

= ([7 + 7]/2, [3 + -7]/2)

= ([14]/2, [-4]/2)

= (7, -2)

8 0
3 years ago
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