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shutvik [7]
3 years ago
9

What's the y-intercept? y= 2x^2+6x+7​

Mathematics
1 answer:
OleMash [197]3 years ago
7 0

Answer:

y intercept(s): (0,7)

Step-by-step explanation:

Mark as Branliest if right!

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What is the area of a triangle with vertices (3,0) (9,0) (7,6)
Nezavi [6.7K]

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices (x_1,y_1),(x_2,y_2),(x_3,y_3) is given by the determinant of the following matrix:

A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|

In this question:

Vertices (3,0) (9,0) (7,6). So

A = \pm 0.5 \left|\begin{array}{ccc}3&0&1\\9&0&1\\7&7&1\end{array}\right|

A = \pm 0.5(3*0*1+0*1*7+1*9*7-0*7*1-0*9*1-3*1*7)

A = \pm 0.5*(63-21)

A = \pm 0.5*42 = 21

The area of the triangle is of 21 units of area.

5 0
2 years ago
Are 8x+ 16 and 4(2x+4) equivalent
8090 [49]
Yes they are equivalent
8 0
3 years ago
Find the sum of all the factors of 32 that are multiples of 4
pshichka [43]
Well all the factors of 32 are 1 and 32, 2 and 16, 4 and 8.
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Which is written in standard form?<br> A.-2x=13<br> B.3x+5y<br> C.1/2x+1/3y=1/5<br> D.-3x+13y=25
ludmilkaskok [199]
Your answer is going to be D
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3) 8а - 5а answer please​
goldfiish [28.3K]

Answer:

8a-5a=3a

Step-by-step explanation:

8-5=3, basically simple subtraction, just bring the variable to the other side.

3 0
3 years ago
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