Is 2.25 plus 6 irrational

Lisa's recipe for 6 dozen cookies has 3/4 cup of butter and 1 1/2 cups of sugar. How much butter does she need to make only 3 do

VikaD [51]

This is basic alegbra, you set up a proportions equations with dozen of cookies over butter. 6/ 3/4 equals 3/x. You cross multiply, 6x equals 2 1/4. You divide 6 on both sides of the equation to isolate x, the variable. 2 1/4 divided by 6 equals 0.375. The answer is 0.375 cups of butter

6 0

3 years ago

Read 2 more answers

Which of the following describe 86? Select all that apply.

Ber [7]

Answer:

A rational number is any number that can be written as a ratio of two integers (hence the name!). In other words, a number is rational if we can write it as a fraction where the numerator and denominator are both integers. ... Irrational, then, just means all the numbers that aren't rational.

Step-by-step explanation:

A rational number is any number that can be written as a ratio of two integers (hence the name!). In other words, a number is rational if we can write it as a fraction where the numerator and denominator are both integers. ... Irrational, then, just means all the numbers that aren't rational.

6 0

4 years ago

A rectangular driveway has an area of 880 square feet and a perimeter of 128 feet. What are the dimensions of the driveway?

mamaluj [8]

Answer:

Dimensions are 20 X 44 feet

Step-by-step explanation:

First we need to build two equations:

For area X times Y = 880

For Perimeter 2x + 2y = 128

Now we need to solve one so we can substitute it into the other:

2x + 2y = 128 becomes

2x = 128 - 2y and then

x = 64 - y We will substitute this into the are equation

(64 - y)y = 880

64y - $y^{2}$ = 880

- $y^{2} + 64y -880 = 0$

factor out the negative

-( $y^{2} - 64y +880 = 0$

Factor:

-(y - 20)(y - 44) = 0

y-20 = 0 and y - 44 = 0

y = 20 and y = 44

Plugging these in two both of our formulas works

20 X 44 = 880 for area

2(20) + 2 (44) = 128 for perimeter

8 0

3 years ago

What is the limit as x is approaching 0 of the absolute value of x

vesna_86 [32]

Recall that, an absolute value expression is a piece-wise in effect, thus we'd check the single-sided limits,

$\bf \lim\limits_{x\to 0}~|x|\implies 
\begin{cases}
\lim\limits_{x\to 0^-}~-x\\\\
\lim\limits_{x\to 0^+}~+x
\end{cases}\implies 
\begin{cases}
0\\\\
0
\end{cases}\implies \lim\limits_{x\to 0}~|x|=0$

6 0

4 years ago

V*w, vectors: r = <8, 1, -6>; v = <6, 7, -3>; w = <-7, 5, 2>

Misha Larkins [42]

<h2>Explanation:</h2><h2 />

Here we have to compute the dot product:

$v\cdot w$