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Alex777 [14]
3 years ago
15

your lunch and your friend steve's lunch cost 19.00. Your lunch was 3.00 more than steve's lunch. How much was steve's lunch?

Mathematics
2 answers:
Brilliant_brown [7]3 years ago
6 0

Answer:

Steve's lunch is $8.00

Step-by-step explanation:

First you have to make a formula for this almost.

s= Steve's lunch

y= your lunch

s= y-3

s+y-19

then plug in s

y-3+y=19

Then simplify   2y-3=19

Add the three to both sides   2y=22

Divide both sides by 2    y=11

Last plug y into one of your formulas

s=Y-3

s=11-3

s=8

BE SURE TO CHECK YOUR ANSWER S+Y=19 11+8=19 :)

never [62]3 years ago
4 0

Answer:

$8.00

Step-by-step explanation:

y + s = 19; y = 3 + s

3 + s + s = 19

2s = 16

s = 8

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3 years ago
Use the Binomial Theorem to expand (x - 4y)³.
lukranit [14]

Answer:

x^3-64y^3

Step-by-step explanation:

(x-4y)^3

(x)^3-(4y)^3

x^3-64y^3

Hope this helps ;) ❤❤❤

8 0
3 years ago
A company sells cans of caviar that say they each contain 100g. of product with a standard deviation of 1g. A consumer advocacy
marin [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 100g

For the alternative hypothesis,

µ < 100g

Due to the <, It means that it is left tailed test.

Since the number of samples is large, the population standard deviation is given, the z test would be used. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

µ = 100g

x = 99 g

σ = 1g

n = 30

z = (99 - 100)/(1/√30) = - 5.48

Looking at the normal distribution table, the probability corresponding to the z score is less than 0.00001

P value < 0.00001

4 0
3 years ago
The velocity of the current in a river is C = 0.6i + 0.8j km/hr. A boat moves relative to the water with velocity v=7i km/hr. a.
AnnyKZ [126]

Answer:

  a. 7.64 km/h

  b. 6.0°

  c. see below

Step-by-step explanation:

a) The total velocity of the boat is ...

  7i +(0.6i +0.8j) = 7.6i +0.8j

The magnitude of this velocity is the speed of the boat, relative to land. That is given by the Pythagorean theorem.

  |7.6i +0.8j| = √(7.6² +0.8²) = √58.4 ≈ 7.642 . . . . km/h

__

b) The angle of the total velocity with respect to the "i" direction (the direction of vector v) is ...

  α = arctan(0.8/7.6) ≈ 6.009°

__

c) The boat is headed in a direction 6° different from its velocity relative to the water. That may need to be accounted for if the boat is traveling any significant distance.

5 0
3 years ago
Is -2 a solution for 7x+3=-17-3x ?​
IRINA_888 [86]

Answer:

yes -2 is the correct answer

Step-by-step explanation:

7x+3=-17-3x

7x+3x=-17-3

10x=-20

x=-20/10

x=-2

5 0
3 years ago
Read 2 more answers
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