All categories

3 years ago

What is 4(-2) - 2y =8?

Mathematics

2 answers:

vladimir1956 [14]3 years ago

7 0

Answer:

y=-8

Step-by-step explanation:

Remember PEMDAS (Parentheses/Exponents/Multiplication/Division/Adding/Subtracting)

Multiply 4 and -2= -8

-8-2y=8

Now do inverse operations

to get rid of the -8 you add it to the other side = -2y=16

Then to get rid of the -2 you divide it out to get the y by it self to get y=-8

nlexa [21]3 years ago

5 0

Answer:

y=-8

Step-by-step explanation:

Step 1) distribute 4(-2)

-8-2y=8

Step 2) add 8 to both sides

-2y=16

Step 3) divide both sides by -2

y=-8

You might be interested in

Forty percent of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask

Kay [80]

Answer:

Let X be the event of feeling secure after saving $50,000,

Given,

The probability of feeling secure after saving $50,000, p = 40 % = 0.4,

So, the probability of not feeling secure after saving $50,000, q = 1 - p = 0.6,

Since, the binomial distribution formula,

$P(x=r)=^nC_r p^r q^{n-r}$

Where, $^nC_r=\frac{n!}{r!(n-r)!}$

If 8 households choose randomly,

That is, n = 8

(a) the probability of the number that say they would feel secure is exactly 5

$P(X=5)=^8C_5 (0.4)^5 (0.6)^{8-5}$

$=56(0.4)^5 (0.6)^3$

$=0.12386304$

(b) the probability of the number that say they would feel secure is more than five

$P(X>5) = P(X=6)+ P(X=7) + P(X=8)$

$=^8C_6 (0.4)^6 (0.6)^{8-6}+^8C_7 (0.4)^7 (0.6)^{8-7}+^8C_8 (0.4)^8 (0.6)^{8-8}$

$=28(0.4)^6 (0.6)^2 +8(0.4)^7(0.6)+(0.4)^8$

$=0.04980736$

(c) the probability of the number that say they would feel secure is at most five

$P(X\leq 5) = P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4) + P(X=5)$

$=^8C_0 (0.4)^0(0.6)^{8-0}+^8C_1(0.4)^1(0.6)^{8-1}+^8C_2 (0.4)^2 (0.6)^{8-2}+8C_3 (0.4)^3 (0.6)^{8-3}+8C_4 (0.4)^4 (0.6)^{8-4}+8C_5(0.4)^5 (0.6)^{8-5}$

$=0.6^8+8(0.4)(0.6)^7+28(0.4)^2(0.6)^6+56(0.4)^3(0.6)^5+70(0.4)^4(0.6)^4+56(0.4)^5(0.6)^3$

$=0.95019264$

8 0

3 years ago

The product of a number and four, increased by 5.

german

I’m pretty sure the answer is 4x+5

3 0

1 year ago

Read 2 more answers

a grocery store buys boxes of cereal for $ 2.00 each and sells them for 50% more. what does the grocery store charge its custome

Natalija [7]

Answer:

$3.00

Step-by-step explanation:

First find the markup

2.00 * 50%

2 * .5

Add this to the original price

2+1 =3

The store sells the cereal for $3.00

4 0

3 years ago

Read 2 more answers

Ella is testing out a new studying method and wants to know if it works. She decides to compare her spelling test scores from la

Mademuasel [1]

Answer:

it would take 4 days

Step-by-step explanation:BRAINLIEST PLEASE

6 0

3 years ago

Find the nth term of the sequence:<br> 9, 4, -1, -6, -11,.............

Elan Coil [88]

Answer:

-15

Step-by-step explanation:

goes down -5 each time

7 0

2 years ago