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kari74 [83]
3 years ago
13

PLZ HELP Word Problems on the system of equations:

Mathematics
1 answer:
ahrayia [7]3 years ago
8 0

Answer:

let the two number be x and y then,

x+y=12

x-y=-4

-----------

2x=8

or, x = 4 put the value of x in first equation

4+y= 12

or, y=12-4

or, y= 8 hence the two number is 4 and 8

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Maryam made a fruit salad with 1 pound of melon and 8 2/5 pounds of berries. How many pounds of fruit did Maryam use in all?
____ [38]

Answer:

9 2/5 lb

Step-by-step explanation:

Both melon and berries are "fruits."

The total weight of the fruit used is thus 1 lb + 8 2/5 lb, or 9 2/5 lb.

6 0
3 years ago
What is the equation to find the slope <br> m=
DiKsa [7]

Answer:

m=\frac{y2-y1}{x2-x1}

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Emily buys a toaster for 10%off if she pays 36 then what was the original price
PtichkaEL [24]
x-0.1x=36

where x is the original price
0.1x is the discount (10% of the original price)
36 is the price paid

x-0.1x=36
0.9x=36
-----   ----
0.9     0.9
x=40

The original price is $40.00

7 0
3 years ago
Read 2 more answers
suppose that the distribution for total amounts spent by students vacationing for a week in florida is normally distributed with
pentagon [3]

The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is 0.8132.

Let x be the total amount spent by students.

x follows normal distribution with mean μ = 650,

                                  standard deviation δ = 120

We take a simple random sample of size n = 10

We are asked to find average spending of 10 students ( x ) is between 600 and 700

We have to find P( 600 <= x <= 700)

According to the sampling distribution of the sample mean x, it follows an approximately normal distribution with mean μ{x} = μ and standard deviation  δ{x} = {δ}/{√n}

Therefore here mean of x,( μ{x} ) = 650 and

standard deviation of x, δ{x} = {120}/{√10} = 37.9473

The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is,

Let Z= x - μ / δ

Z₁ = 600 - 650 / 37.9473 = -1.32 similarly

Z₂ = 700 - 650 / 37.9473 = 1.32

From standard normal distribution table, P( -1.32 <  x  <  1.32) = 0.8132

The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is 0.8132

To learn more about Normal distribution click here:

brainly.com/question/15103234

#SPJ4

3 0
1 year ago
PWEASE HELP ASAP my friends and I cant figure this out I'm hoping one of u guys can
Degger [83]

The number of viruses was 4000 times greater than number of protozoa.

Step-by-step explanation:

Given,

Number of protozoa = 5*10^5

Number of viruses = 2*10^9

Let,

x be the number of times number of viruses is greater than number of protozoa.

Number of viruses = Number of time * Number of protozoa

2*10^9=(5*10^5)x

Dividing both sides by 5*10^5

\frac{2*10^9}{5*10^5}=\frac{(5*10^5)x}{5*10^5}\\\\4*10^3= x\\x=4*10^3 \\x=4000

The number of viruses was 4000 times greater than number of protozoa.

Keywords: division, scientific notation

Learn more about division at:

  • brainly.com/question/10046556
  • brainly.com/question/100704

#LearnwithBrainly

3 0
3 years ago
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