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3 years ago

X+2y=-2 3x+4y=6 ????

Mathematics

2 answers:

Korvikt [17]3 years ago

6 0

Answer:

X+2y=-23x+4y=6

=(x,y)= (6/25, 72/25)

Neporo4naja [7]3 years ago

6 0

They both equal 0! To solve you move the variables to the right, then divide both sides then write in parametric form and solve to get 0! Also you should use PEMDAS

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A bakery uses 8 tablespoons of honey for every 10 cups of flour to make bread dough. Some days they bake smaller batches, but th

tester [92]

Answer: 8:10, 8 to 10, 8/10

Step-by-step explanation:

7 0

4 years ago

The sides of a triangle are 3 consecutive odd integers and the shortest side is 20% of the perimeter of the triangle. What is th

AysviL [449]

Answer:

15 units

Step-by-step explanation:

The terms of an odd integer are given by 2n - 1. Since the sides of the triangle are three consecutive odd integers, let them be 2n - 1, 2(n + 1) - 1 and 2(n + 2) - 1 respectively, where 2n - 1 is the shortest side

Let P = perimeter of triangle = 2n - 1 + 2(n + 1) - 1 + 2(n + 2) - 1

= 2n - 1 + 2n + 2 - 1 + 2n + 4 - 1

= 2n - 1 + 2n + 1 + 2n + 3

= 2n + 2n + 2n - 1 + 1 + 3

= 6n + 3

Since the shortest side is 20% of the perimeter of the triangle, we have that

2n - 1 = 20%(6n + 3)

2n - 1 = 0.2(6n + 3)

expanding the bracket, we have

2n - 1 = 1.2n + 0.6

subtracting -1.2n and adding +1 to both sides, we have

2n - 1.2n = 1 + 0.6

0.8n = 1.6

dividing both sides by 0.8, we have

n = 1.6/0.8

n = 2

Since P = 6n + 3, substituting n = 2, we have

P = 6(2) + 3 = 12 + 3 = 15 units

3 0

3 years ago

The sum of two consecutive odd integers is at most 166. What are the greatest consecutive odd integers?

bagirrra123 [75]

. x + (x + 2)≤166
. 2x+2≤166
. x≤83 - 1
. x≤82
. x=81
. 81+(81+2)=164; 164<166
answer: 81 and 83

4 0

4 years ago

Members of a softball team raised $1334.50 to go to a tournament. They rented a bus for $779.50 and budgeted $46.25 per player f

grin007 [14]

Answer:

Step-by-step explanation:

The most important factor is the total budget $1334.50, for the softball tournament.

1. Subtract $779.50 from $1334.50 = $555

2. We have $555 left, and a budget of $46.25 per player for meals

3. Divide 555/46.25 = 12

4. 12 softball players can be brought to the tournament

4 0

2 years ago

Read 2 more answers

The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership

Shkiper50 [21]

Answer:

$z=\frac{750-800}{\frac{350}{\sqrt{100}}}=-1.429$

Step-by-step explanation:

Data given and notation

$\bar X=750$ represent the sample mean

$\sigma=350$ represent the population standard deviation for the sample

$n=100$ sample size

$\mu_o =800$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is lower than 800, the system of hypothesis would be:

Null hypothesis: $\mu \geq 800$

Alternative hypothesis: $\mu < 800$

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{750-800}{\frac{350}{\sqrt{100}}}=-1.429$

5 0

4 years ago