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Natasha2012 [34]
3 years ago
7

ANSWER ASAP!!!!!!!

Mathematics
1 answer:
Luba_88 [7]3 years ago
5 0
-4*-2+2=8+2=10 > 10 is false
-4*2+2= - 8+2= - 6 >10 is false
-4*3+2= -12+2=- 10 >10 is false
-4*-4+2=16+2=18>10 is true

the answer is -4
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A square has an area of 81 cm.(squared)What is the length of each side?
Andrej [43]

Answer:

9

Step-by-step explanation:

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3 years ago
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For what value of c does x^2−2x−c=4 have exactly one real solution?<br> PLEASE HELP!!!!!!!
Paul [167]

Answer:

-5

Step-by-step explanation:

Moving all terms of the quadratic to one side, we have

x^2-2x-(c+4)=0.

A quadratic has one real solution when the discriminant is equal to 0. In a quadratic ax^2+bx+d, the discriminant is \sqrt{b^2-4ad}.

(The discriminant is more commonly known as \sqrt{b^2-4ac}, but I changed the variable since we already have a c in the quadratic given.)

In the quadratic above, we have a=1, b=-2, and d=-(c+4). Plugging this into the formula for the discriminant, we have

\sqrt{(-2)^2-4(1)(-(c+4)).

Using the distributive property to expand and simplifying, the expression becomes

\sqrt{4-4(-c-4)}=\sqrt{4+4c+16}\\~~~~~~~~~~~~~~~~~~~~~~=\sqrt{20+4c}\\~~~~~~~~~~~~~~~~~~~~~~=\sqrt{4}\cdot\sqrt{5+c}\\~~~~~~~~~~~~~~~~~~~~~~=2\sqrt{c+5}.

Setting the discriminant equal to 0 gives

2\sqrt{c+5}=0.

We can then solve the equation as usual: first, divide by 2 on both sides:

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3 0
2 years ago
What is the definition of relation mathematical
babymother [125]
Relations are ordered pair sets (x,y) mapping a value to another value
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5 0
3 years ago
My question got deleted so I'll post these into two separate
Agata [3.3K]

Answer:

see below

Step-by-step explanation:

1 million

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Rounding to 3 decimal places

.032 years

50 years * 365 days/ 1 year * 24 hours/ 1 day * 3600 second / 1 hour    

1577000000 seconds    

46 inches * 1 ft/ 12 inches *  1 mile/5280 ft

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8 0
3 years ago
The lengths of the sides of a triangle are represented by 3 consecutive even integers. if the perimeter of the triangle is 72 fe
iris [78.8K]
P = a + b + c
P = 72
a = x
b = x + 2
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72 = x + x + 2 + x + 4
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the sides of ur triangle are : 22,24,26 <==
6 0
2 years ago
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