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
Rashid [163]
3 years ago
11

A textbook store sold a combined total of 274 psychology and biology textbooks in a week. The number of psychology textbooks sol

d was 78 more than the number of biology textbooks sold. How many textbooks of each type were sold?
Mathematics
2 answers:
Shalnov [3]3 years ago
6 0

Answer:176 psychology textbooks and 98 Biology textbooks were sold.

Step-by-step explanation:

Let x represent the number of psychology textbooks that were sold.

Let y represent the number of biology textbooks that were sold.

textbook store sold a combined total of 274 psychology and biology textbooks in a week. This means that

x + y = 274 - - - - - - - - - - -1

The number of psychology textbooks sold was 78 more than the number of biology textbooks sold. This means that

x = y + 78

Substituting x = y + 78 into equation 1, it becomes

y + 78 + y = 274

2y = 274 - 78

2y = 196

y = 98

x = y + 78 = 98 + 78

x = 176

Anna [14]3 years ago
5 0

Answer:psychology books sold=173

Biology books sold=95

Step-by-step explanation:

Psychology textbooks sold=p

Biology textbooks sold=b

P+b=274

P-78=b

P+P-78=274

2P-78=274

2P=274+78

2P=352

P=352/2

P=173

Substance P=173 in P-78=b

173-78=b

95=b b=95

You might be interested in
Which equation is in slope-y-intercept form?
Mariana [72]

Answer:

C = y - 3x-1

Step-by-step explanation:

Slope intercept form is

y = mx+b where m is the slope and b is the y intercept

C = y - 3x-1 is in slope intercept form

7 0
3 years ago
Read 2 more answers
Which of the following is the slope-intercept form of 6x + 2y = 28
PolarNik [594]
The answer is Y=-3x+14
4 0
3 years ago
Read 2 more answers
Determine which of the mapping diagrams represents a relation that is not a function.
Andrej [43]

Answer:

See attachment

Step-by-step explanation:

The relation that is not a function is shown in the attachment.

For a relation to be a function, it must be either one-to-one or many-to-one.

The relation shown in the attachment is one-to-many relation hence it is not a function.

This is because -5 corresponds to -4 and 3,making the graph of this relation to fail the vertical line test.

8 0
4 years ago
At the beginning of last year , there were 368 students at the elementary school . by the beginning of this year 72 of those stu
VARVARA [1.3K]
The answer is 296. hope this helps:]
8 0
3 years ago
What calculates the slope of a line from two coordinate points from that line?
Softa [21]

Answer:

The slope of a line characterizes the direction of a line. To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .

5 0
3 years ago
Other questions:
  • Is 2 between 1.3 an 1.4
    8·2 answers
  • Which statement is true?
    8·1 answer
  • Which represents the solution(s) of the system of equations, y + 4 = x2 and y-x=2? Determine the solution set by
    15·1 answer
  • The valoe of these seven in 27,459 is how many times value of the 7 in 40,735
    7·1 answer
  • lisa's family drove 830.76 miles to visit her grandparents. Lisa calculated that they used 30.1 gallons of gas. How many miles p
    5·2 answers
  • An airplane flies with a constant speed of 660 miles per hour. How long will it take to travel a distance of 2475 miles?
    13·1 answer
  • the length of a new rectangular playing field is 8 yards longer than triple the width.if the perimeter of the rectangular playin
    13·1 answer
  • What is the factor of 32 and 50
    8·2 answers
  • Which ones are correct?
    8·2 answers
  • I need help with LINES!!!! ASAP!!!!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!