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3 years ago

I don't know how to subtract intgers can someone help like. 5-(-8)

2 answers:

8 0

13 because when you subtract a negative it makes it positive and you would go 5-(-8) = 5+(+8) just make the negatives into positives when the negatives are right next to each other.

tankabanditka [31]3 years ago

5 0

Its 13, because you multiply -8 and the negative beside it which turns it into a positive so you add 8 and 5

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Kristen invests $5,745 in a bank. The bank pays 6.5% interest compounded monthly. How long must she leave the money in the bank

s344n2d4d5 [400]

formula is $A=P(1-\frac{r}{n})^{nt}$

where A=final amount

P=principal

r=interest rate in decimal

n=number of times per year it is compounded

t=time in years

we want to find where

A=2P

and P=5745

and r=6.5%=0.065

n=monthly=12

remember that $ln(x^a)=a(ln(x))$

also that $(a^b)^c=a^{bc}$

$2(5745)=5745(1+\frac{0.065}{12})^{12t}$ , solving for t

divide both sides by 5745 to simplify things a bit

$2=(1+\frac{0.065}{12})^{12t}$ I'd rather not simplify this because it give us a decimals and those aren't exact, if we combine, we get 12.065/12 for inside parenthases

$2=(\frac{12.065}{12})^{12t}$

take ln of both sides

$ln(2)=ln((\frac{12.065}{12})^{12t})$

$ln(2)=(12t)ln(\frac{12.065}{12})$

divide both sides by $12ln(\frac{12.065}{12})$

$\frac{ln(2)}{12ln(\frac{12.065}{12})}=t$

using our calculator, t≈10.6927

so rounded, we get 10.7 years

3 0

3 years ago

3[-x + (2 x + 1)] = x - 1<br><br> what is x

lubasha [3.4K]

Answer:

the answer is x=-2 as answer

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2 years ago

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

hodyreva [135]

Answer:

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Looking at the given values, as x is increasing, y is also increasing. The constant of proportionality is

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Therefore, the relationship is a direct variation and the function to model it is

y = 3x

Step-by-step explanation:

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2 years ago

What is the solution for 2t <5

Luba_88 [7]

Divide 2 from both sides
t < 5/2
Hope this helps!

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3 years ago

Read 2 more answers

Mr. Marcus is splitting a huge new pack of colored pencils equally among his 25 students. After splitting the pencils he has 4 l

mamaluj [8]

Answer:

Each student got 17 pencils

Step-by-step explanation:

(429-5)/25=x

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3 years ago