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
matrenka [14]
3 years ago
7

Solving special systems {y=1/2x+4 {-1/2x+y=-5

Mathematics
1 answer:
ryzh [129]3 years ago
7 0

Answer:

no solution

Step-by-step explanation:

Given the 2 equations

y = \frac{1}{2} x + 4 → (1)

- \frac{1}{2} x + y = - 5 → (2)

Substitute y = \frac{1}{2} x + 4 into (2)

- \frac{1}{2} x + \frac{1}{2} x + 4 = - 5 , that is

4 = - 5 ← not possible

This indicates the system has no solution

You might be interested in
2. (10.03)
faust18 [17]

This question is incomplete because it was not written properly

Complete Question

A teacher gave his class two quizzes. 80% of the class passed the first quiz, but only 60% of the class passed both quizzes. What percent of those who passed the first one passed the second quiz? (2 points)

a) 20%

b) 40%

c) 60%

d) 75%

Answer:

d) 75%

Step-by-step explanation:

We would be solving this question using conditional probability.

Let us represent the percentage of those who passed the first quiz as A = 80%

and

Those who passed the first quiz as B = unknown

Those who passed the first and second quiz as A and B = 60%

The formula for conditional probability is given as

P(B|A) = P(A and B) / P(A)

Where,

P(B|A) = the percent of those who passed the first one passed the second

Hence,

P(B|A) = 60/80

= 0.75

In percent form, 0.75 × 100 = 75%

Therefore, from the calculations above, 75% of those who passed the first quiz to also passed the second quiz.

3 0
2 years ago
What is the volume of a square pyramid with a base length of 4 cm and a height of 9 cm?
soldier1979 [14.2K]
V = 48
A square pyramid is a polyhedron with a square base and 4 triangular faces. All the triangular faces meet at a single point called the apex. The faces of the pyramid connect the bases with the apex. Volume of a Square Pyramid is the measure of the number of units occupied by the pyramid. 
<span>
</span>
7 0
3 years ago
Read 2 more answers
What is the value of the expression below
spayn [35]

Answer:

10

Step-by-step explanation:

For this you just have to plug 2 into a and 4 into b. You come to this expression:

3(2) + 4

This gives you 10

4 0
3 years ago
Read 2 more answers
How to solve combing functions<br> Do I do this pls help
Over [174]

Answer:

3x - 2

Step-by-step explanation:

f(x) + g(x)

sub in functions

2x + 1 + x - 3

combine

3x -2

3 0
2 years ago
In a certain country the life expectancy for women in 1990 was 45 and in 2000 it was 85?years. Assuming that life expectancy bet
Darya [45]

Answer:

49145 years

Step-by-step explanation:

In a certain country the life expectancy for women in 1990 was 45 and in 2000 it was 85?years.

Assuming that life expectancy between 2000 and 2100 increases by the same percentage as it did between 1900 and 2000,what will life expectancy be for women in 2100?

In 10 years, the expectancy increased by 85/45 = 17/9

between 2000 and 2100, it will increas by 10 time 10 years, so expected expectancy is  85*(\frac{85}{45})^{10} = 49145  years

4 0
3 years ago
Other questions:
  • Factor 1/8 out of 1/8x + 7/8
    13·1 answer
  • I keep getting questions like this on my assignment and I just don’t understand what it’s asking me to input ?
    5·1 answer
  • ava wants to buy three pairs of a certain style of jeans at two different stores jeans jam sells the jeans 25% off the $24.99 re
    9·1 answer
  • The lengths of the diagonals of a rhombus are 2 in. and 5 in. Find the measures of the angles of the rhombus to the nearest degr
    10·1 answer
  • Jonathan bought a table and some chairs at a furniture store. The equation that models this situation is y=25x+80, where y is th
    5·2 answers
  • Sheryl is choosing a briefcase. There are 6 leather cases, 8 vinyl cases, and 5 steel cases. How many choices for a briefcase do
    13·2 answers
  • Lenny’s favorite radio station has this schedule:<br> A.<br> B.<br> C.<br> D.
    12·1 answer
  • Find the total surface area of this cone, leaving your answer in terms of pi​
    11·1 answer
  • Can someone explain this / answer, Its a picture
    6·1 answer
  • A bee flies at 10 feet per second directly to a flowerbed from its hive. The bee stays at the flowerbed for 18 ​minutes, and the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!