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frosja888 [35]
2 years ago
12

Please tell me which one are positive and negative

Mathematics
1 answer:
Karo-lina-s [1.5K]2 years ago
6 0

Answer:

Negative, Positive, Negative, Positive

Step-by-step explanation:

1. 18.75 + (-19)

Adding a negative is the same as subtracting. 18.75 - 19 is -0.25 so the first answer is negative.

2. -3 \frac{7}{10} + 3\frac{4}{5}

If you convert the fraction in the second term to one with the same denominator (three and 8 10ths), you can see that since 8 tenths is more than 7 tenths, the equation will result in positive 1/10

3. 9.4 + (-9\frac{3}{5})

3/5 is the same as 6/10 or .60

9.6 is more than 9.4, so the negative is further from zero than the positive.

4. -7 + 7 + 1/2

-7 + 7 is zero. zero + 1/2 is positive 1/2

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Evaluate the function at the given value and simplify.
Licemer1 [7]

Answer:

The correct option is b.

Step-by-step explanation:

The given function is

f(x)=-5x+1

We need to find the value of f(-2). It means we have to find the value of given function at x=-2.

Substitute x=-2 in the given function to find the value of f(-2).

f(-2)=-5(-2)+1

On simplification we get

f(-2)=10+1

f(-2)=11

The value of f(-2) is 11. Therefore the correct option is b.

8 0
3 years ago
One smartphone plan costs $52 per month for talk and messaging and $8 per gigabyte of data used each month. A second smartphone
nevsk [136]

Answer:

a) 6 gigabytes

b) $100

Step-by-step explanation:

Let c represent the total cost in dollars and d represent the amount of data used in gigabytes.

For the first smartphone

One smartphone plan costs $52 per month for talk and messaging and $8 per gigabyte of data used each month.

Equation =

c = 52 + 8d

For the Second smartphone

A second smartphone plan costs $82 per month for talk and messaging and $3 per gigabyte of data used each month.

Equation =>

c = 82 + 3d

How many gigabytes would have to be used for the plans to cost the same?

We would equate both cost to each other

52 + 8d = 82 + 3d

Collect like terms

8d - 3d = 82 - 52

5d = 30

d = 30/5

d = 6

Therefore,

a) The number of gigabytes for the cost of both Smartphone data plans to be the same = 6 gigabytes.

b) The cost of both plans if 6 gigabytes is used =>

c = 52 + 8d

c = 52 + 8 × 6

c = $100

3 0
3 years ago
What is the slope of the line with the given slope and y intercept m=1/4,b=-3/4
Arturiano [62]

Answer:

y=1/4x-3/4

Step-by-step explanation:

y=mx+b

where m=slope and b=y-intercept,

y=1/4x+(-3/4)

y=1/4x-3/4

6 0
3 years ago
PLZ DO THIS NOW I NEED IT AND TODAY IS MY BIRTHDAY
AnnZ [28]

Answer:

pm is a right angle thats all i know

Step-by-step explanation:

8 0
2 years ago
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Martin is two years older than Reese, and the same age as Lee. If Lee is 12, how old is Reese?
joja [24]

Answer:

Reese has 10 years old.

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2 years ago
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