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3 years ago

2х + Зу = -8 2х + Зу = 5 Solve and Explain how please

Mathematics

1 answer:

marshall27 [118]3 years ago

6 0

Answer:

my only guess is that if x and y have the same value for both equations it would not make sense if you have the same 2x+3y equal 2 different things

Step-by-step explanation:

thats my guess i hope this helps

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If you want to know how many shirts and pairs of pants he bought, what matrix equation could you write to solve?

Nonamiya [84]

Answer:

Step-by-step explanation:

The equations are ...

... s + p = 15

... 3s + 10p = 94

Matrix equation A is equivalent.

3 0

3 years ago

Plz help ill give u brainlist

marissa [1.9K]

The formula of pyramid is 1/3 Bh where B is area of base and h is height.

So it's just V = (1/3)·10·10·12 = 400

Final answer: 400 ft³

7 0

3 years ago

The amount of sales tax on a new car is directly proportional to the purchase price of the car. Victor bought a new car for $30,

Airida [17]

Answer:

Rita paid 47,500 dollars for the purchase price.

Step-by-step explanation:

We are given the sales tax on a new car is directly proportional to the purchase price of the car which means there is is something k such that

when you multiply it to the sales tax you get the purchase price.

Let's set this equation:

y=kx

Let y represent the purchase price and x the sales tax.

The second sentence tells us that (x,y)=(1500,30000).

We can plug this into y=kx to find the constant k. (Constant means it stays the same no matter what the input and output is).

So we have:

30000=k(1500)

300 =k(15) I went ahead and divided previous equation by 100.

Now divide both sides by 15:

300/15=k

Simplify:

20=k

So the equation to use the answer the question is

y=20x

where y is purchase price and x is sales tax.

So we want to know the purchase price on a car if the sales tax is 2375.

So replace x with 2375:

y=20(2375)

y=47500

3 0

3 years ago

Read 2 more answers

Solve the equation 6 = -9 – 6x for x.

Evgesh-ka [11]

Answer:

a. -5/2

Step-by-step explanation:

8 0

3 years ago

(1.1.8 in the book) Let P be the proposition ’I bought a lottery ticket this weekend’ and Q be the proposition ’I won the millio

Karolina [17]

Answer:

~ is for negation

^ is for "and"

v is for "or"

=> for "if then"

<=> for "if and only if"

Step-by-step explanation:

(a) ~P (negation of P)

I didn't buy a lottery ticket this weekend.

(b) P v Q (P is in disjunction Q)

I have either bought a lottery ticket this weekend or won the million dollar jackpot.

I won the million dollar jackpot because I bought a lottery ticket this weekend.

(d) P ^ Q (P is in conjunction with Q)

I bought a lottery ticket this weekend, and I won the million dollar jackpot.

(e) P <=> Q (P and Q are dependent on each other)

If only I had bought a lottery ticket this weekend, I would have won the million dollar jackpot.

(f) ~P => ~Q (negation of Q is a consequence of negation of P)

I didn't win the million dollar jackpot because I didn't buy a lottery ticket this weekend.

(g) ~P ^ ~Q (negation of P is in conjunction with negation of Q)

I neither bought a lottery ticket this weekend nor won the million dollar jackpot.

(h) ~P v (P ^ Q)

This is logically equivalent to (~P v P) ^ (~P v Q) (negation of P is in disjunction with P, and also with disjunction with Q), and can be best expressed as:

It didn't matter that I bought a jackpot ticket or not, I won the million dollar jackpot.

8 0

3 years ago