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3 years ago

How can you check if the point (-3, -7) is a solution to the following system of equations: y = 4x 5 and y = x - 4 *

Mathematics

2 answers:

Kipish [7]3 years ago

4 0

Sometimes we’ll it should be sometimes

Ket [755]3 years ago

3 0

I think it’s sometimes

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Factor and find the zeros of the function : 12x^2+11x-15

DiKsa [7]

$12x^2+11x-15 = 0$

$(4x - 3)(3x + 5) = 0$

$(4x - 3) = 0 \ or \ (3x + 5) = 0$

$x = \dfrac{3}{4} \ or \ x = -\dfrac{5}{3}$

7 0

3 years ago

State the property that justifies the statement: If 4x + 9 = 15 and X=2y + 1,

GREYUIT [131]

Answer:

Substitution property of equality

Step-by-step explanation:

Given

$4x + 9 = 15$ and $x = 2y + 1$

Then

$4(2y + 1) + 9 = 15$

Required

State the property

From the list of options, (d) answers the question.

This is so because:

Substitution property of equality states that

If $a = b$ then $b = a$

In other words, both can replace one another.

So if $x = 2y + 1$ , then 2y + 1 can be substituted for x in $4x + 9 = 15$

So:

$4x + 9 = 15$ becomes

$4(2y + 1) + 9 = 15$

<em>Hence, it is substitution property of equality</em>

6 0

3 years ago

Jason spends 18 hours over three

svet-max [94.6K]

Answer:

42 hours

Step-by-step explanation:

18 ÷3=6

6×7=42

4 0

4 years ago

Read 2 more answers

There are 312 cards in 6 deck of playing cards write the ratio as a fraction them find the unit rate

ladessa [460]

Answer:

6x: 312

x: 52

Step-by-step explanation:

Let the deck be denoted by x then

6x: 312

There are 312 cards in 6x decks

In 1 deck x there are 312/6= 52 cards

6x: 312

6x/6: 312/6 Cancelling both sides by 6

x: 52

In ratio both the sides are divided by the same number to get equivalent fractions.

In 1 deck there are 52 cards

3 0

3 years ago

The diameter of a pipe is normally distributed, with a mean of 0.8 inch and a variance of 0.0025. What is the probability that t

fgiga [73]

Answer:

0.02275

Step-by-step explanation:

Standard deviation is the square root of variance

Standard deviation= Square(0.0025)= 0.05

Because of the normally distributed, the z- score for 0.9 inches is:

(0.9-0.8)/0.05= 2

-> P(x<= 0.9)= P(2) = 0.97725

-> P (x>= 0.9)= 1-0.97725 = 0.02275

7 0

3 years ago