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3 years ago

What is the answer to the question

Mathematics

2 answers:

Akimi4 [234]3 years ago

4 0

The answer is 3 as said above

Serhud [2]3 years ago

3 0

Answer:

± 3

Step-by-step explanation:

h(x) = sqrt( 2x+1)

h(4) = sqrt(2*4+1)

= sqrt(8+1)

= sqrt(9)

± 3

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A bank teller provides the balance of Halle’s account before and after she withdraws some money. Before: $500 After: $327

vredina [299]

That means she withdrew 173 dollars

3 0

2 years ago

2. Inflation is at a rate of 7% per year. Evan's favorite bread now costs $1.79. What did it cost 10 years ago? How long

Makovka662 [10]

Answer:

It cost $0.91 10 years ago.

It takes 10.24 years for the cost of bread to double.

Step-by-step explanation:

The equation for the price of bread after t years has the following format:

$P(t) = P(0)(1+r)^{t}$

In which P(0) is the current price, and r is the inflation rate, as a decimal.

If we want to find the price for example, 10 years ago, we find P(-10).

Inflation is at a rate of 7% per year. Evan's favorite bread now costs $1.79.

This means that $r = 0.07, P(0) = 1.79$ . So

$P(t) = P(0)(1+r)^{t}$

$P(t) = 1.79(1+0.07)^{t}$

$P(t) = 1.79(1.07)^{t}$

What did it cost 10 years ago?

$P(-10) = 1.79(1.07)^{-10} = 0.91$

It cost $0.91 10 years ago.

How long before the cost of the bread doubles?

This is t for which P(t) = 2P(0) = 2*1.79. So

$P(t) = 1.79(1.07)^{t}$

$2*1.79 = 1.79(1.07)^{t}$

$(1.07)^{t} = 2$

$\log{(1.07)^{t}} = \log{2}$

$t\log{1.07} = \log{2}$

$t = \frac{\log{2}}{\log{1.07}}$

$t = 10.24$

It takes 10.24 years for the cost of bread to double.

5 0

3 years ago

–8(–7r – 7) + 8 =-272

Mademuasel [1]

Answer:

-8(-7r-7)+8=-272

We move all terms to the left:

-8(-7r-7)+8-(-272)=0

We add all the numbers together, and all the variables

-8(-7r-7)+280=0

We multiply parentheses

56r+56+280=0

We add all the numbers together, and all the variables

56r+336=0

We move all terms containing r to the left, all other terms to the right

56r=-336

r=-336/56

r=-6

6 0

3 years ago

Help please

WINSTONCH [101]

Answer:

57+20= 90 (false)

40+39= 79 (true)

5 0

2 years ago

Read 2 more answers

What is the difference between the two inequalities? Explain.

iris [78.8K]

Answer:

One includes 3 as a solution, one excludes it.

Step-by-step explanation:

Think about the difference between the phrase "they were shorter than me" and the phrase "they were no taller than me." In the first one, we're implying that this other person can't be as tall as you; their height has to be less than yours. In the second, we're allowing for the posibility that this person's height matches yours. x < 3 describes that first kind of scenario, while x ≤ 3 describes the second.

8 0

3 years ago