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Elodia [21]
3 years ago
7

-10 x 2/5 A) -7 B)2/5 C)-2 OR D) -1/2

Mathematics
2 answers:
Leya [2.2K]3 years ago
6 0

Answer: b

Step-by-step explanation:

Nina [5.8K]3 years ago
6 0

Answer: -10 × 2/5 = -4

Step-by-step explanation:

-10 × 2 = -20 -20÷5 = -4 OR

-10÷5 = -2 ×2= -4. OR

Change 2/5 to a decimal

.4 × -10 = -4

The options in answers in the question are incorrect.

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The equation for a parabola has the form y=????x2+????x+cy=ax2+bx+c, where ????a, ????b, and cc are constants and ????≠0a≠0. Fin
d1i1m1o1n [39]

The equation for this parabola satisfies

\begin{cases}a-b+c=9\\9a+3b+c=-19\\16a-4b+c=-12\end{cases}

(in other words, plug in each given point's coordinates (x,y) into the equation y=ax^2+bx+c)

Now,

(a-b+c)-(9a+3b+c)=9-(-19)\implies-8a-4b=28\implies2a+b=-7

(a-b+c)-(16a-4b+c)=9-(-12)\implies-15a+3b=21\implies5a-b=-7

and

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2(-2)+b=-7\implies b=-3

(-2)-(-3)+c=9\implies c=8

So the equation of the parabola is

y=-2x^2-3x+8

4 0
4 years ago
Greg buys apples, bananas, and kiwis from a fruit stand each week. The first week he pays $3.19 for 2 apples, 3 bananas, and 2 k
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Answer:

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I think it’s 25.12 or C

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