All categories

3 years ago

Answer the question.

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

4 0

$280

10 * 28 = 280 hope this helps :)

You might be interested in

Prove that root 7 is irrational by the method of contradiction

Alchen [17]

Let assume that $\sqrt7$ is a rational number. Therefore it can be expressed as a fraction $\dfrac{a}{b}$ where $a,b\in\mathbb{Z}$ and $\text{gcd}(a,b)=1$ .

$\sqrt7=\dfrac{a}{b}\\\\7=\dfrac{a^2}{b^2}\\\\a^2=7b^2$

This means that $a^2$ is divisible by 7, and therefore also $a$ is divisible by 7.

So, $a=7k$ where $k\in\mathbb{Z}$

$(7k)^2=7b^2\\\\49k^2=7b^2\\\\7k^2=b^2$

Analogically to $a^2=7b^2$ ------- $b^2$ is divisible by 7 and therefore so is $b$ .

But if both numbers $a$ and $b$ are divisible by 7, then $\text{gcd}(a,b)=7$ which contradicts our earlier assumption that $\text{gcd}(a,b)=1$ .

Therefore $\sqrt7$ is an irrational number.

8 0

4 years ago

3. A woman deposits Php 23,200 into her account. How much would

nikklg [1K]

Answer:

(assuming simple interest)

I'll setup the problem and you can do the computation

Step-by-step explanation:

The formula for simple interest:

I = P*r*t

P = deposits

r = interest rate per period (a year)

t = number of periods

P = Php 23,200

r = 0.06

t = 1

If you have questions, send me a comment

3 0

3 years ago

a test has 40 questions. denise finished 2/5 of the questions in the first 10 minutes and 1/2 of the remaining questions in the

timofeeve [1]

That would be 28 questions. Hope I helped!

3 0

3 years ago

74.21 in written form

DENIUS [597]

Seventy four and twenty-one hundredths.

5 0

3 years ago

5 X 4,257 estimate Estimate Answer Please type it like that

Nadya [2.5K]

Answer: 20,000

Step-by-step explanation:

We can estimate the product of 5 and 4,257 by multiplying 5 by 4,000

5 * 4,000 = 20,000

The product of 5 and 4,257 is about 20,000

The real answer (not an estimate)

21,285

That is around 20,000 so we are correct

5 0

3 years ago