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3 years ago

Determine if the system of equations has one solution, no solution or infinitely many solutions.

Mathematics

1 answer:

Paraphin [41]3 years ago

6 0

Answer:

−

Explanation:

simply subtract each term in the second equation from the first equation:

−

(

−

)

(

−

)

(

−

(

−

)

(

)

(

−

)

(

−

)

−

now use either original equation to solve for

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(

−

)

−

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In a hypothetical study looking at the scores of 100 people in an entrance exam, it was determined that the average score was 95

blagie [28]

Answer: 0.0228

Step-by-step explanation:

Given : In a hypothetical study looking at the scores of 100 people in an entrance exam, it was determined that the average score was 95 with a standard deviation of 10.

i.e. $\mu=95\ \ \&\ \sigma=10$

Let x denotes the scores.

We assume that the scores are normally distributed.

Then, the proportion of individuals in this population have a score greater than 115 will be :-

$P(x>115)=1-P(x\leq115)\\\\=1-P(\dfrac{x-\mu}{\sigma}$

Hence , the proportion of individuals in this population have a score greater than 115 = 0.0228

8 0

3 years ago

Find 40% of 28. Use a fraction

Schach [20]

=40/100×28
=56÷5
=11and1/5

7 0

3 years ago

Solve this in distributing -(5.3x-7y)-9.6

algol13

Answer:

$-\left(5.3x-7y\right)\left(-9.6\right)=\:50.88x-67.2y$

Step-by-step explanation:

Given the expression

$-\left(5.3x-7y\right)\times \left(-9.6\right)$

$=-\left(-9.6\right)\left(5.3x-7y\right)$

Apply distributive law

$a\left(b-c\right)=ab-ac$

$a=-\left(-9.6\right),\:b=5.3x,\:c=7y$

so the expression becomes

$=-\left(-9.6\right)\times \:5.3x-\left(-\left(-9.6\right)\right)\times \:7y$

$=-\left(-9.6\right)\times \:5.3x+7\left(-9.6\right)y$ ∵ $-\left(-a\right)=a$

$\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a,\:-\left(-a\right)=a$

$=9.6\times \:5.3x-7\times \:9.6y$

$=50.88x-7\times \:9.6y$

$=50.88x-67.2y$

Therefore,

$-\left(5.3x-7y\right)\left(-9.6\right)=\:50.88x-67.2y$

3 0

3 years ago

The average price of a gallon of milk is $3.31. If the price increases .88% each year , how much will a gallon of milk cost in 2

musickatia [10]

Answer:

$3.94

Step-by-step explanation:

You will need to use the compound interest formula for this.

$P(1+\frac{r}{n} )^{nt}$

P = initial balance

r = interest rate

n = number of times compounded annually

t = time

Your equation will look like this:

$3.31(1+\frac{.0088}{1} )^{20}$ = 3.94

5 0

4 years ago

Help me plz !!!!!!!!!!!!!!!

seropon [69]

Answer:

A. 2/3 book/hour

Step-by-step explanation:

rewrite the fractions as a decimal if it can make it easier for you (0.5 book/0.75 hours) then divide which is 2/3 book/hour

8 0

3 years ago