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4 years ago

Which of the expressions have positive values and which have negative values 7-(-4) -3+(-2) 5-8 -10+12

Mathematics

1 answer:

barxatty [35]4 years ago

4 0

Answer:

Positive: 7-(-4) and -10+12

Negative -3+(-2) and 5-8

Step-by-step explanation:

Addition and subtraction rules:

2 negatives make a positive

A bigger positive number added to a smaller negative number is positive

A negative plus a negative is a negative.

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CAN SOMEONE PLEASE HELP ME???!!!

Vikentia [17]

Answer: Try A, it's in a straight line

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Step-by-step explanation:

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3 years ago

What is the value of y?

4vir4ik [10]

B. 40

Explanation:
40+10= 50, 2x40= 80, 50
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3 years ago

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8) T

saveliy_v [14]

Answer:

independent and 3/8

Step-by-step explanation:

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4 years ago

Leno4ka [110]

Answer: OPTION C.

Step-by-step explanation:

The formula of Exponential Growth has the following form:

$y=C(1+r)^t$

Where "C" is the initial value, "r" is the growth rate and "t" is the time in years.

In this case we have the following expression:

$1,500(1.02)^t$

We can identify that:

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Therefore, the meaning of the expression is: The initial number of trees planted by the agency is 1,500, and the growth rate is 2% per year.

3 0

3 years ago

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Betsy, a recent retiree, requires $5000 per year in extra income. She has $60000 to invest and can invest in B-rated bonds p

solniwko [45]

Betsy needs to invest $32,000 in the B-rated bonds paying 13% interest and $28,000 in the certificate of deposit paying 3% interest.

Interest is calculated by multiplying the rate with the principal.

Let x = the amount Betsy will invest in the B-rated bonds paying 13% per annum. The remaining amount, $60,000-x , she will invest in the certificate of deposit paying 3% per annum.

We can express the earnings on these two investments, after converting the percentages to their decimal equivalents, as: 0.13x+0.03(60000-x) and this is to earn a total of $5,000

Now we can write the necessary equation to solve for x.

or, 0.13x+0.03(60000-x) = 5000

or, 0.13x+1800-0.03x = 5000

or, 0.1x+1800 = 5000

or, 0.1x = 3200

or, x = 32000

So Betsy needs to invest $32,000 in the B-rated bonds paying 13% interest and the remainder ($60,000-$32,000 = $28,000) in the certificate of deposit paying 3% interest to obtain $5,000 in interest per annum.

To learn more about interest:

brainly.com/question/13324776

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1 year ago