1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NikAS [45]
2 years ago
11

Which first step for solving the given system using substitution results in an equation wit

Mathematics
1 answer:
Paraphin [41]2 years ago
8 0
I don’t know if I’m right but I got 2/3 but you should use desmos
You might be interested in
The probability density function of the time it takes a hematology cell counter to complete a test on a blood sample is f(x)=0.0
uysha [10]

Answer:

a) 20%

b) 40%

c) Mean = 62.5 seconds; Variance = 52.083 seconds

Step-by-step explanation:

The time it takes a hematology cell counter to complete a test on a blood sample is continuously distributed over the period of 50 to 75 seconds with probability f(x) = 0.04.

a) The percentage of tests require more than 70 seconds is:

P(X>70) = 1- \frac{70-50}{75-50} \\P(X>70) =0.2 = 20\%

b)The percentage of tests that require less than one minute (60 seconds) is:

P(X70) =0.4 = 40\%

c) The mean and variance of a continuous distribution are determined by:

M=\frac{A+B}{2}=\frac{50+75}{2}\\ M= 62.5\ seconds\\\\V=\frac{(B-A)^2}{12}=\frac{(75-50)^2}{12}\\  V= 52.083\ seconds

Mean = 62.5 seconds.

Variance = 52.083 seconds.

3 0
3 years ago
a store is having a sale on chocolate chips and walnuts. for 9 pounds of chocolate chips and 7 pounds of walnuts, the total cost
Ratling [72]

Answer:

The cost for each pound of chocolate chips is $2.75 and the cost for each pound of walnuts is $3.75.

Step-by-step explanation:

9x+7y=51

3x+5y=27

----------------

9x+7y=51

-3(3x+5y)=-3(27)

-------------------------

9x+7y=51

-9x-15y=-81

-------------------

-8y=-30

8y=30

y=30/8

simplify,

y=15/4

9x+7(15/4)=51

9x+105/4=51

9x=51-105/4

9x=(204-105)/4

9x=99/4

x=(99/4)/9

x=(99/4)(1/9)=99/36

simplify

x=2.75

So the cost for each pound of chocolate chips is $2.75 and the cost for each pound of walnuts is $3.75.

7 0
3 years ago
Chris bought six pounds of apples for
lesya692 [45]

Answer:

B. $27.00

Step-by-step explanation:

1 pound of apple = $10.80/6

a pound of apple cost $1.8

15 pounds of apple is = 15*1.8

=$27

7 0
3 years ago
Read 2 more answers
Write the algebraic expression that matches each graph? PLS HELP I NEED HELP!!!
Vladimir [108]

Looks like y = |x| because the slopes of the lines are both 1

You shift it to the right making it |x-2| and you shift it down making y = -2

combine to get <em>y = |x - 2| - 2</em>.

8 0
3 years ago
Read 2 more answers
Round 639,121 to the nearest ten thousand.
VLD [36.1K]

Answer:

640,121

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • How do i get the answer to this question 1.7h-(1.4h+5)
    14·1 answer
  • I need help ASAP please. I need the answer
    11·1 answer
  • Please find x pleaseeeee
    12·2 answers
  • Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show that quadrilateral ABCD is a parallelo
    12·1 answer
  • What is the slope of the line parallel to 7x + 4y = -16?
    6·1 answer
  • Which expression is equivalent to 80 ?<br> O 42.5<br> o<br> 24.5<br> O v2.2.5<br> 0122. 122. 152
    15·2 answers
  • The number 2 in the expression 5+2x is called the coefficient of x. how does changing the coefficient to 6 change the meaning of
    9·1 answer
  • Find the length of UX
    7·1 answer
  • Use identities,evaluate 496X404
    12·1 answer
  • Earlier in this course, you explored Euclidean geometry, which is the study of flat space. This approach follows the teachings o
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!