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
noname [10]
3 years ago
11

3x - 5y = 15.

Mathematics
1 answer:
antoniya [11.8K]3 years ago
4 0

Answer:

(0,-3)

(5,0)

(10,3)

(20,9)

Step-by-step explanation:

Given

3x - 5y = 15

Required

Form 4 pairs of (x,y) values

This question will be answered based on assumptions of x and y values;

Haven said that:

For point 1

Take x = 0

Substitute 0 for x in 3x - 5y = 15

3(0) -5y = 15

-5y = 15

Solve for y

y = 15/-5

y = -3

So; the first pair is:

(0,-3)

For point 2:

Take y = 0

Substitute 0 for y in 3x - 5y = 15

3x - 5(0) = 15

3x = 15

Solve for x

x  = 15/3

x = 5

So, the pair is

(5,0)

For point 3:

Take x = 10

Substitute 10 for x in 3x - 5y = 15

3(10) - 5y = 15

30 - 5y = 15

Collect Like Terms

-5y = 15 - 30

-5y = -15

Solve for y

y = -15/-5

y = 3

So, the pair is:

(10,3)

For point 4:

Take y = 9

Substitute 9 for y in 3x - 5y = 15

3x - 5(9) = 15

3x - 45 = 15

Collect Like Terms

3x = 45 + 15

3x = 60

Solve for x

x = 60/3

x = 20

So, the pair is:

(20,9)

You might be interested in
How much larger is 400 than 40?
dlinn [17]
360

400 - 40 = 360

Did I help? Say thanks on my profile!
8 0
3 years ago
Read 2 more answers
The relationship between two variables partialling out the effect that a third variable has on one of those variables can be exp
TiliK225 [7]

Answer: partial correlation.

Explanation:

partial correlation measures the degree of association between two random variables, with the effect of a set of controlling random variables removed. If we are interested in finding to what extent there is a numerical relationship between two variables of interest, using their correlation coefficient will give misleading results if there is another, confounding, variable that is numerically related to both variables of interest. This misleading information can be avoided by controlling for the confounding variable, which is done by computing the partial correlation coefficient.

3 0
2 years ago
The symbol ⊕ is used to denote exclusive or, so p ⊕ q ≡ (p v q) ^ ~ (p ^ q).
Elan Coil [88]

I'll use text forms of the logical symbols because copying/pasting on mobile is annoying.

⊕ = XOR

∨ = OR

∧ = AND

~ = NOT

↔ = IFF (meaning "if and only if")

→ = IMP (short for "implies")

and for logical equivalence I'll use a regular equal sign.

Then

p XOR q = (p OR q) AND NOT (p AND q)

(a) By definition of XOR, we have

p XOR p = (p OR p) AND NOT (p AND p)

= p AND NOT p

and this is tautologically FALSE.

(b) To rewrite XOR, first distribute the NOT over the AND using DeMorgan's law:

NOT (p AND q) = NOT p OR NOT q

Then we can interchange the AND and ORs using their respective distributive properties. That is,

p XOR q = (p OR q) AND (NOT p OR NOT q)

= (p AND (NOT p OR NOT q)) OR (q AND (NOT p OR NOT q))

= ((p AND NOT p) OR (p AND NOT q)) OR ((q AND NOT p) OR (q AND NOT q))

Both (p AND NOT p) and (q AND NOT q) are tautologically FALSE, so the truth value of either OR depends only on the other statements, so we have

p XOR q = (p AND NOT q) OR (q AND NOT p)

Recall the definition of IFF:

p IFF q = (p IMP q) AND (q IMP p)

Also recall that IMP is logically equivalent to

p IMP q = p OR NOT q

Then we have

p IFF q = (p OR NOT q) AND (q OR NOT p)

so that its negation is

NOT (p IFF q) = NOT ((p OR NOT q) AND (q OR NOT p))

= NOT (p OR NOT q) OR NOT (q OR NOT p)

= (NOT p AND q) OR (NOT q AND p)

The statements in bold match, so p XOR q is indeed equivalent to NOT (p IFF q).

3 0
2 years ago
Seventy percent of all vehicles examined at a certain emissions inspection station pass the inspection. Assuming that successive
NeX [460]

Answer:

(a) 0.343

(b) 0.657

(c) 0.189

(d) 0.216

(e) 0.353

Step-by-step explanation:

Let P(a vehicle passing the test) = p

                        p = \frac{70}{100} = 0.7  

Let P(a vehicle not passing the test) = q

                         q = 1 - p

                         q = 1 - 0.7 = 0.3

(a) P(all of the next three vehicles inspected pass) = P(ppp)

                           = 0.7 × 0.7 × 0.7

                           = 0.343

(b) P(at least one of the next three inspected fails) = P(qpp or qqp or pqp or pqq or ppq or qpq or qqq)

      = (0.3 × 0.7 × 0.7) + (0.3 × 0.3 × 0.7) + (0.7 × 0.3 × 0.7) + (0.7 × 0.3 × 0.3) + (0.7 × 0.7 × 0.3) + (0.3 × 0.7 × 0.3) + (0.3 × 0.3 × 0.3)

      = 0.147 + 0.063 + 0.147 + 0.063 + 0.147 + 0.063 + 0.027

      = 0.657

(c) P(exactly one of the next three inspected passes) = P(pqq or qpq or qqp)

                 =  (0.7 × 0.3 × 0.3) + (0.3 × 0.7 × 0.3) + (0.3 × 0.3 × 0.7)

                 = 0.063 + 0.063 + 0.063

                 = 0.189

(d) P(at most one of the next three vehicles inspected passes) = P(pqq or qpq or qqp or qqq)

                 =  (0.7 × 0.3 × 0.3) + (0.3 × 0.7 × 0.3) + (0.3 × 0.3 × 0.7) + (0.3 × 0.3 × 0.3)

                 = 0.063 + 0.063 + 0.063 + 0.027

                 = 0.216

(e) Given that at least one of the next 3 vehicles passes inspection, what is the probability that all 3 pass (a conditional probability)?

P(at least one of the next three vehicles inspected passes) = P(ppp or ppq or pqp or qpp or pqq or qpq or qqp)

=  (0.7 × 0.7 × 0.7) + (0.7 × 0.7 × 0.3) + (0.7 × 0.3 × 0.7) + (0.3 × 0.7 × 0.7) + (0.7 × 0.3 × 0.3) + (0.3 × 0.7 × 0.3) + (0.3 × 0.3 × 0.7)

= 0.343 + 0.147 + 0.147 + 0.147 + 0.063 + 0.063 + 0.063

                  = 0.973  

With the condition that at least one of the next 3 vehicles passes inspection, the probability that all 3 pass is,

                         = \frac{P(all\ of\ the\ next\ three\ vehicles\ inspected\ pass)}{P(at\ least\ one\ of\ the\ next\ three\ vehicles\ inspected\ passes)}

                         = \frac{0.343}{0.973}

                         = 0.353

3 0
3 years ago
Read 2 more answers
Nine -tenths of zak's friends do volunteer work after school. what is nine-tenths in standard form?
alisha [4.7K]
9/10 = 0.9 = (9) 1 tenths.
8 0
2 years ago
Other questions:
  • 50 tens equals how many hundreds
    7·2 answers
  • Daniel has a collection of stamps worth $6. He has five more 8 cents stamps than 30 cents stamps. The number of 6 cents stamps i
    15·1 answer
  • What is negative 32 equals six m minus two?
    11·1 answer
  • Brent uses 3/4 cups of sugar for a batch of lemon bars. How much sugar will he need to make 6 batches of lemon bars?
    9·2 answers
  • What is the percent of change from 50 to 46?
    14·1 answer
  • Con un diámetro de 4x y un ares de 28.26cm cual es el valor de X
    13·1 answer
  • If a bike travels 15m in 2 sec, what is its speed in km/h?
    6·1 answer
  • In triangle ABC,the measure of angle A is 78° and the measure of angle B is 35° What is the measure of angle C
    7·1 answer
  • Estimate 18.22 + 8.531 by first rounding each number to the nearest tenth
    7·2 answers
  • Find the 10th term, 18, 72,288,...
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!