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Reil [10]
3 years ago
7

Please help me I'm so bad at math and doing AFDA really doesn't help..

Mathematics
1 answer:
lions [1.4K]3 years ago
4 0

Answer:

2, 1 and -3

Step-by-step explanation:

Given the quadratic expression

x^2+2x = 3

Write in standard format

x^2+2x-3 = 0

Get the value of a, b and c

The standard form is ax^2+bx+c = 0

ax^2 = x^2

a = 1

bx = 2x

b = 2

c = -3

Substitute into the general formula

x = -b±√b²-4ac/2a

x = -2±√(2)² - 4(1)(-3)/2(1)

The correct values are the values in bold format

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What is the solution of this linear system?{X+Y=13 1/2x+y=10
xxMikexx [17]
X       +y=13
1/2*x+y=10   |-1

x       +y=13
-1/2*x-y=- 10   } +

x-1/2*x=13-10
1/2*x=3
x=3*2
x=6

6+y=13
y=13-6
y=7
The solution is : (6,7)


7 0
3 years ago
Re-write the quadratic function below in Standard Form<br> y= –2(x + 5)(x – 4)
Naddik [55]

Answer:

y = - 2x² - 2x + 40

Step-by-step explanation:

Standard form of a quadratic is y = ax² + bx + c : a ≠ 0

Given

y = - 2(x + 5)(x - 4) ← expand factors using FOIL

  = - 2(x² - 4x + 5x - 20)

  = - 2(x² + x - 20) ← distribute parenthesis by - 2

  = - 2x² - 2x + 40 ← in standard form

6 0
3 years ago
Solve the equation x^2 – 16x + 25 = 0 to the nearest tenth.
iren [92.7K]

Answer:

1.8 and 14.3

Step-by-step explanation:

Our equation is a quadratic equation so we will use the dicriminant method

  • Let Δ be our dicriminant
  • a=1
  • b= -16
  • c= 25
  • Δ= (-16)²-4*25*1=156≥0
  • so we have two solutions : x and y
  • x= (16-\sqrt{156})/2= 1.7555≈ 1.8
  • y=(16+\sqrt{156})/2=14.244≈ 14.3

5 0
3 years ago
bob eats 6 apples in 2 days. how many days will it takes to eat a basket of apples containing 51 apples?
Ilia_Sergeevich [38]
If he eat 6 apples in 2 days so we can say he eat 3 apple in 1 day so if we want to know in how many days he can eat 51 apple you can say 51 ÷ 3= 17 also we can say 1day / 3 apples = ? days / 51 apples ⇒ 51×1 / 3 = 17 so he can eat 51 apples in 17 days :))))
i hope this be helpful 
* happy new year * 
3 0
4 years ago
Read 2 more answers
You are 100m from the base of a tall building. If your feet are exactly 180m from the top of the building, how tall is the build
KatRina [158]

Answer:

the building would be 280 feet (judging on how this is worded.)

Step-by-step explanation:

you are already 100 meters from the base ( bottom) of the building so you add 180 as you are 180 ft from the top of the building. 100 + 180 is equal to 280.

8 0
2 years ago
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