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4 years ago

13

John spent half of his allowance at the batting cages. To earn more money his parents let him vacuum the house for 6$ what is hi

s weekly allowance if he ended up with 20$

1 answer:

Nataliya [291]4 years ago

7 0

28 dollars is his allowance

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Write 7.25 in word form.

Nady [450]

Seven and a quarter or seven point twenty-five

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Tim is making 30 sundaes with mint, chocolate, and vanilla ice cream.

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Value of Y in formula shown when X=4/5 Y= 4/x + ✔️x + 0.2 - 5x

olga55 [171]

Answer:

The value of Y is 2.09443

Step-by-step explanation:

We have to find the value of Y for the given value of x.

The equation of Y is given by

$Y=\frac{4}{x}+\sqrt x+0.2-5x$

And the value of x is 4/5. On substituting this value of x in the equation of y, we get

$Y=\frac{4}{\frac{4}{5}}+\sqrt {\frac{4}{5}}+0.2-5\cdot \frac{4}{5}$

$Y=5+\frac{2}{\sqrt5}+0.2-4$

Add/subtract the numbers, we get

$Y=2.09443$

Therefore, the value of Y is 2.09443

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4 years ago

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6. Prove that for an integer n, n2 - n is divisible by 2. 7. Prove A SAUB, for all sets A,B

Flura [38]

Answer:

1. We will prove by induction over n, that for an integer n, $n^2-n$ is divisible by 2.

For n= 1, $1^2-1=0$ and $\frac{0}{2}=0$ . Then for n=1 the property is satisfied.

Suppose as induction hypothesis that for an integer n, $n^2-n$ is divisible by 2, that is, $\frac{n^2-n}{2}=b, \text{ for some integer b}$ .

Let's see with n+1.

$(n+1)^2-(n+1)=n^2+2n+1-n-1=n^2-n+2n+2$

But,

$\frac{n^2-n+2n+2}{2}=\frac{n^2-n}{2}+\frac{2(n+1)}{2}$ ,

by induction hypothesis

$\frac{n^2-n}{2}+\frac{2(n+1)}{2}=b+(n+1)\in\mathbb{Z}$

This shows that for n+1 the property is satisfied, then we can conclude that that for an integer n, $n^2-n$ is divisible by 2.

2. Let $A, B$ sets. By definition,

$A\cup B=\{x: x\in A \text{ or } x\in B\}$

Then, each element of A is in $A\cup B$ , that is, $A\subset A\cup B$ .

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4 years ago

How do i solve for x in x/9=6

Dahasolnce [82]

Answer:

x=54

Step-by-step explanation:

$\frac{9}{1} x \frac{x}{9} =6 x 9$

x=54

plz mark brainliest

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2 years ago

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