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Phantasy [73]
3 years ago
9

Solve the expression: x = 5, y = 8. x² - 3y =

Mathematics
1 answer:
Fed [463]3 years ago
3 0

Answer:

x^2-3y

5^2-3*8

25-24

1

Step-by-step explanation:

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Solve the system of equations. y=4x+5y=x2+12x+20
Viefleur [7K]

Answer:

 \begin{pmatrix}x=-3,\:&y=-7\\ x=-5,\:&y=-15\end{pmatrix}\\

Step-by-step explanation:

\begin{bmatrix}y=x^2+12x+20\\ y=4x+5\end{bmatrix}

\mathrm{Subtract\:the\:equations}

y=x^2+12x+20

y-y=x^2+12x+20-\left(4x+5\right)

\mathrm{Simplify}

0=x^2+8x+15

3 0
2 years ago
I need help plsssss asap
Lunna [17]

Answer:

D) (0,9.5) and (10,1.5)

Step-by-step explanation:

a line of best fit is a line that is drawn through the data points on the scatter plot. Option D is the only answer that draws a linear line through the data points.

Option A makes a short line above the points. if the line is not through the points, it doesn't work

Option B is drawing a positive line (as in it's increasing) and therefore cannot work

Option C draws a line below the points and does not represent the line of best fit for this scatter plot

8 0
2 years ago
What is the surface area of this rectangular prism?​
castortr0y [4]

Answer:

Step-by-step explanation:

2 surfaces that are 5x7

2 surfaces that are 4x7

and the top and bottom that are 4x5

2*5*7 = 70

2*4*7 = 56

2*4*5 = 40

total surface is 166 cm^{2}

8 0
3 years ago
Read 2 more answers
I need some help with this worksheet! Major points !!! . (not good with percentages)
yuradex [85]

To make the equations you must first get the percents and make them into a decimal. then multiply the money by the decimal

EX: $230.76 with a profit of 30%

First make the percent a decimal to do so move the . over to the left two times resulting in the number .30

so the equation is 230.76(.30)

which equals 69.228

now simplify it making the answer $69.23

now to get the store price, add manufacture price with the %30 of the the MP resulting in the answer

$299.99

4 0
3 years ago
Bethania's garden is in the shape of a right triangle. She has built walls on two sides
worty [1.4K]

Answer:

8 feet

Step-by-step explanation:

you use pythagoras so you do 6² + 4² =52. then you square root 52 which is 7.2 so she needs 8 feet.

3 0
4 years ago
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