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GenaCL600 [577]
3 years ago
10

Evaluate -x^2-2x+5 when x=-10

Mathematics
1 answer:
kvv77 [185]3 years ago
6 0
If I'm correct and the ^ stands for multiplication then the answer should be 5.

The picture is my work just ignore the fraction.

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The area of a circle is 81 ft 2 . What is the π circumference? Leave in terms of Pi.
KonstantinChe [14]

Answer:

10.2π

Step-by-step explanation:

Given data

Area of circle=  81 ft^2

Also, the expression for the area of a circle is

A=πr^2

substitute

81=3.142*r^2

r^2= 81/3.142

r^2= 25.77

square both sides

r= √25.77

r= 5.1

Also, the expression for the circumference is

C= 2πr

substitute

C= 2*π*5.1

C= 10.2π

Hence the circumference is 10.2π

7 0
3 years ago
Your friend gives you a simple regression fit for predicting house prices from square feet. the estimated intercept is –44850 an
Zina [86]

Answer:

  3022.08 . . . dollars per square meter

Step-by-step explanation:

The slope is multiplied by the factor that changes units:

  (280.76 dollars/ft²)×(1 ft²)/(.092303 m²) ≈ 3022.08 dollars/m²

3 0
3 years ago
2
DochEvi [55]

Use Ga_thMath(u) (brainly doesn't allow me to type it) To use the app u need to take a pic of the problem and then it will process it and you'll get ur answer ASAP(most of the time). Many questions have been asked before so search it on brainly.

8 0
3 years ago
Solve this system of equations:<br><br><br><br> What is the value of x?
Ipatiy [6.2K]

Answer:

2

Step-by-step explanation:

Substitute y=2x in the first equation into the second.

The second equation then becomes;

x = -(2x)+6

x = -2x+6

Collectiing like terms, more -2x to the left,

x+2x =6

3x=6

x=\frac{6}{3}

x= 2

7 0
3 years ago
Which number sentence is represented by the number line?
strojnjashka [21]

Answer:

8

Step-by-step explanation:

it is 8

5 0
2 years ago
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