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PolarNik [594]
3 years ago
12

Solve this quadratic equation using the quadratic formula. 5 - 10x - 3x2 = 0

Mathematics
1 answer:
Olegator [25]3 years ago
5 0

-3x^2 - 10x + 5 = 0

Quadratic formula:

-b +/- sqrt[b^2 - 4(a)(c)]/2(a)

So. . . 10 +/- sqrt[(10^2) - 4(-3)(5)]/2(-3)

10 +/- sqrt[100+60]/ -6

10 +/- sqrt[160]/-6

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12 minutes to drive 30 laps; 48 minutes to drive 120 laps
myrzilka [38]
You can divide 12min.➗30lps. Then you divide 48➗120lps.
And the answer will be 12➗30=0.4 then 48➗120=0.4 and the answer is that the ratios or rates are equvalent by dividing.
7 0
3 years ago
Brenda is cooking couscous. The recipe says she requires 480 grams of couscous for 4 people. How many will she need for 14?
alexgriva [62]

Answer:

1,680\ g

Step-by-step explanation:

we know that

Brenda requires 480 grams of couscous for 4 people

so

using proportion

Find out how many grams of couscous she requires for 14 people

Let

x -----> the amount of grams

\frac{480}{4}\frac{g}{people}=\frac{x}{14}\frac{g}{people} \\\\x=14*480/4\\\\x=1,680\ g

4 0
3 years ago
Please help me thank you very much
frez [133]
Answer is A
Triangle UVW ~ Triangle UWT ~ Triangle  WVT
5 0
3 years ago
Please help me i'll give 20 points to whoever helps me answer all 4 of them and brainly
Brilliant_brown [7]

Answer:

G - number of arrangements

F. the amount of her allowance

B. y = x

H. the number of hours

7 0
2 years ago
Which point gives the vertex of ƒ(x) = –x2 + 4x – 3?
Dmitriy789 [7]

Answer:

The vertex is (2,1)

Step-by-step explanation:

ƒ(x) = –x^2 + 4x – 3

Factor out the negative

   = -(x^2 -4x+3)

 Factor

What 2 numbers multiply to +3 and add to -4

-3*-1 = 3

-3+-1 = -4

f(x) =  -( x-3)(x-1)

Find the zeros

0 = -( x-3)(x-1)

0 = x-3   0 = x-1

x=3            x=1

The x value of the vertex is 1/2 way between the two zeros

(3+1)/2 = 4/2 =2

To find the y value, substitute x=2 in

f(2) =  -( 2-3)(2-1)

       =-(-1)(1) = 1

The vertex is (2,1)

4 0
2 years ago
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