Writing in Math. Explain how the digit 7 can have different values.

Answers

Answer 1

Answer: The value of a number is for example 7, 70 (but also 8, 80, etc). 7 can refer to the value of seven if it's on its own or if it's on the rightmost position, but in the number 75, seven refers to the value of 70. The same digit can have different values in a place value system where the value represented by a digit depends on its position.

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Write the word sentence as an equation. Then solve. 12 more than a number n is −9.

Answers

n+12=-9
n= -21
12+9=21
then make it a negative
so... -21

How is 3/4 written in decimal

Answers

3/4

= 0.75

Divide and move the decimal 2 places to the left.

0.75 is how 3/4 is written in decimal

What is 7 29/80 as a decimal

Answers

Answer:

Answer is 19.31 .

Step-by-step explanation:

Given : $\7frac{29}{80}$ .

To find: Write it in decimal form .

Solution: We have given that

$\7frac{29}{80}$ .

Convert the mixed fraction into improper fraction .

$(589)/(80)$ .

convert into decimal by dividing 589 by 80 .

= 19.31

Therefore , answer is 19.31 .

I Think First You Would Need To Turn It Into A Improper Fraction Then Divide The Denominator Into The Numerator .. Simply If Needed

If r(x) = 2 – x2 and w(x) = x – 2, what is the range of (w.r) (x)?

Answers

For this case we have by definition that:

$(f * g) (x) = f (x) * g (x)$

In this case we must find $(w* r) (x)$ , so:

$(w * r) (x) = w (x) * r (x) = (x-2) (2-x ^ 2) =$

We must apply distributive property that states that:

$(a + b) (c + d) = ac + ad + bc + bd$

So:

$(x-2) (2-x ^ 2) = 2x-x ^ 3-4 + 2x ^ 2 = -x ^ 3 + 2x ^ 2 + 2x-4$

The range is the set of all "y" values

Valid That is to say: (-∞,∞)

Answer:

(-∞,∞)

You receive 9 text messages in 12 minutes. What is the rate of text messages per hour?

Answers

Answer:

$45(messages)/(hour)$

Step-by-step explanation:

we know that

To find the rate of text messages per hour, first divide the total messages by the total time in minutes

$(9)/(12)=0.75(messages)/(minute)$

Convert to messages per hour

Remember that $1\ hour=60\ minutes$

Multiply by $60$

$0.75*60=45(messages)/(hour)$

9 text messages in 12 min ⇒ how many text messages in 60 min
9×60÷12 = 45 text messages :))

Write an explicit formula for the sequence -3, 1, 5, 9 ... i think the answer is a_n=-3+4(n-1) i just need someone to double check me :)

Answers

Answer:

you are correct

Step-by-step explanation:

The sequence has a common difference between consecutive terms

d = 9 - 5 = 5 - 1 = 1 - (- 3) = 4

This indicates the sequence is arithmetic with explicit formula

$a_(n)$ = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 3 and d = 4, thus

$a_(n)$ = - 3 + 4(n - 1) = - 3 + 4n - 4 = 4n - 7

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