All categories

3 years ago

If x+y=2 and x-y=1 then:

1 answer:

8 0

X + y = 2

x - y = 1

Adding the equations,

x + y + x - y = 2 + 1

2x = 3

x = $\frac{3}{2}$

x + y = 2

y = 2 - x

y = $2 - \frac{3}{2} = \frac{4-3}{2} = \frac{1}{2}$

You might be interested in

Please help me number one and two <br> Thank

notsponge [240]

Number two should correspond for the graphs, with graph paper, just follow the color coded lines. Hope this helps.

3 0

3 years ago

The width of a rectangle is 8y- 1.5 feet and the length is 1.5y+9 feet. Find the perimeter of the rectangle.

lyudmila [28]

Answer:

$P=19y+15$

Step-by-step explanation:

Step one:

Given data

dimension of the rectangle

Width = 8y-1.5

Length = 1.5y+9

Required

The expression to represents the Perimeter

Step two:

the perimeter of a rectangle is expressed as

$P= 2L+2W\\\\P=2(1.5y+9)+2(8y-1.5)\\\\P=3y+18+16y-3\\\\$

collect like terms

$P=3y+16y+18-3\\\\P=19y+15$

6 0

3 years ago

What number does the model below best represent?

umka21 [38]

Answer: 85 or 85% or 85/100

Step-by-step explanation:

This is because there are a total of 100 squares in the grid, and out of those 100 there are 85 squares shaded in. So the model best represents 85, 85%, or 85/100. These answers are dependent on what choices you have for the possible answer.

7 0

3 years ago

Write an equation that models the scenario if x represents the number of nights and y represents the total cost of the trip. (th

Cloud [144]

Answer:

f(x)=50x

Step-by-step explanation:

f(x)= y

y= 50

if x is 1 the answer is 50

if x is 2 the answer is 100

The numbers will just keep getting higher depending on the x value

7 0

4 years ago

An optical inspection system is used to distinguish among different part types. The probability of a correct classification of a

Whitepunk [10]

Answer: $\mu=2.88\ \&\ \sigma^2=0.115$

Step-by-step explanation:

Given : The probability of a correct classification of any part is : p=0.96

sample size : n= 3

The formula to find the mean and variance for binomial distribution is given by :-

$\mu=np\\\\\sigma^2=np(1-p)$

Let the random variable X denote the number of parts that are correctly classified.

The, for the given situation, we have

$\mu=3(0.96)=2.88\\\\\sigma^2=(3)(0.96)(1-0.96)=0.1152\approx0.115$

Hence, the mean and variance of X are 2.88 and 0.115 respectively.

4 0

4 years ago