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3 years ago

What is 38.3 minus -1.2?

1 answer:

6 0

(38.3 - -1.2) = 39.5

Anytime you have two minuses beside each other, you add.
If you have a plus sign in the middle, but one of the numbers is negative you subtract.

Hope that makes sense ! (:

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The sales tax in one town is 8%. So, the total cost of an item can be written as c +0.08c. What is the total cost of an item tha

allsm [11]

$12.96 is your answer

8 0

3 years ago

Read 2 more answers

9/20

NISA [10]

For this case we must find the solution of the following quadratic equation:

$x ^ 2 + 5x + 7 = 0$

Where:

$a = 1\\b = 5\\c = 7$

Then, the solution is given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values:

$x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}$

By definition we have: $i ^ 2 = -1$

$x = \frac {-5 \pm \sqrt {3i ^ 2}} {2}\\x = \frac {-5 \pm i \sqrt {3}} {2}$

Thus, we have two complex roots.

Answer:

The equation has no real roots.

4 0

4 years ago

A 4-pound bag of potatoes costs $3.16 how much would 32 pounds of potatoes costs

zimovet [89]

Answer:

$25.28

Step-by-step explanation:

Since a 4 pound bag cost $3.16 you would do 32 divided by 4 and you would get 8. Then you would do 8 times 3.16 and you get 25.28.

The long way:
4 bags = 3.16
8 bags = 6.32
12 bags = 9.48
16 bags = 12.64
20 bags = 15.80
24 bags = 18.96
28 bags = 22.12
32 bags = 25.28

7 0

3 years ago

How many ways are there to choose a committee of 7 people from a group of 10 people?

Aneli [31]

I think it's 720
Have a GREAT day!

7 0

4 years ago

Me. Mesa and Ms. Felipe are going to race each other to see who is going to pay for lunch. Ms. Felipe decides to give Ms. Messa

tia_tia [17]

Answer:

1. y=7x

2. y=9x

Step-by-step explanation:

7 0

3 years ago