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3 years ago

A letter/symbol that takes place of an unknown number?

2 answers:

7 0

This is called a variable and some examples would be almost any letter depending on the question but the most common letters would be X and Y

densk [106]3 years ago

3 0

Answer: A variable

Step-by-step explanation:

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Write equation for the center(-1,0) radius of 6

Ira Lisetskai [31]

Answer:

(x+1)² + y² = 36

Step-by-step explanation:

<u>Equation of a circle:</u>

(x-h)² + (y-k)² = r²

Center: (h,k)

Radius: r

Given a center of (-1,0) and a radius of 6, we have for our equation:

(x-(-1))² + (y-0)² = 6²

(x+1)² + y² = 36

3 0

3 years ago

What is the solution to the system of linear equations?<br> y=x-1<br> y= -x+3

Artemon [7]

Answer: x=2 and y=1

Step-by-step explanation:

8 0

3 years ago

A cup of coffee with temperature 155degreesF is placed in a freezer with temperature 0degreesF. After 5 minutes, the temperatur

Leviafan [203]

Answer:

45.50° F

Step-by-step explanation:

As per Newton's law,

$T(t) = T_{s}+(T_{0} + T_{s})e^{-kt}$

When T(t) is the final temperature

$T_{s}$ = Temperature of surrounding

$T_{0}$ = Initial temperature

t =duration of cooling

k = constant

$103=0+(155-0)e^{-k\times 5}$

$103=155e^{-5k}$

Now take natural log on both the sides

$ln(103)=ln(155e^{-5k})$

$ln(103)=ln(155)+ln(e^{-5k})$

$ln(103)=ln(155)=-5k$

4.6347 - 5.0434 = -5k

$k=\frac{0.40872}{5}$

k = 0.0817

$T(t)=0+(155-0)e^{(0.0817\times 15)}$

= $155e^{-1.226}$

= 155 (02935)

= 45.49 ≈ 45.50° F

8 0

4 years ago

Write 1/2 as a percent

Yakvenalex [24]

1/2 as a percent is 0.5

8 0

3 years ago

Read 2 more answers

I have 45 cents in nickels.

pentagon [3]

Answer:

135

Step-by-step explanation:

43 times 3 is 135

5 0

3 years ago