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s2008m [1.1K]
3 years ago
10

Evaluate -3x^2-4x=-1

Mathematics
1 answer:
Butoxors [25]3 years ago
5 0
Use the Quadratic formula, 

x= -b +/- sqrt(b^2-4ac)
     -------------------------
                2a

x= 4 +/- sqrt(16+12)
     ----------------------
              -6

x = 4+/- sqrt(28)
      ---------------
            -6

x = 4 +/- 2*sqrt(7)
      ------------------
              -6

x= 2(2+/- sqrt(7))
     ------------------
            2(-3)


x= 2+/- sqrt(7)
     --------------
           -3
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3. I am collecting baseball cards. My goal before I turn 18 is to have 500 cards. When I tumed 10,
vladimir2022 [97]

Based on the scenario given, the equation to describe the situation will be: c + 125 + 89 = 500 and 286 cards need to be collected.

Number of cards given by grandfather = 125 cards

Number of cards that will be given by father = 89 cards

Therefore, based on the information given, the equation to describe the situation will be:

c + 125 + 89 = 500

Therefore, we can then use the equation to calculate the number of cards that need to be collected. This will be:

c + 125 + 89 = 500

c + 214 = 500

c = 500 - 214

c = 286

Therefore, the person needs to collect 286 cards.

Read related link on:

brainly.com/question/24910157

7 0
2 years ago
☝︎image<br> HELP ME PLEASEE
spin [16.1K]

Answer:

7. 5

8. 33. 3333 or 100/ 3

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5 0
2 years ago
PLEASE HELP!!!!!! The length of a rectangle is three times its width. If the perimeter of the rectangle is 56 cm, find its area.
Alexus [3.1K]

Step-by-step explanation:

l = length

w = width

l = 3w

perimeter p = 2l + 2w = 56

using the identity of the first equation

p = 2(3w) + 2w = 56

6w + 2w = 56

8w = 56

w = 7 cm

l = 3w = 3×7 = 21 cm

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8 0
2 years ago
X squared=yw-3 make x the subject
KengaRu [80]
X²=yw-3
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7 0
3 years ago
HELP ASAP WILL GIVE BRAININST IF:
DiKsa [7]

Answer:

<em><u>slope is -7/8</u></em>

Step-by-step explanation:

ok

first remember these to formulas:

m= \frac{y2-y1}{x2-x1}

and

y-y1 = m(x-x1)

now insert the points:

\frac{-3-4}{3-(-5)}= -7/8

slope intercept form:

y - 4 = -7/8(x - (-5)

y - 4 = -7/8(x + 5)

y =  -7x/8 - 3/8

Have a nice day!

and if you have a question or if I did anything wrong please tell me.

3 0
3 years ago
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