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3 years ago

(5+4-2)×(-2)=idfkadtsphm

Mathematics

1 answer:

lbvjy [14]3 years ago

6 0

5+4=9 9-2=7

7x(-2)= (-14)

your answer is -14

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46 decreased by twice Chau's savings. use the variable c to represent Chau's savings.

dedylja [7]

46 -2c

46 decreased by means 46 minus
Twice c would be c times 2

4 0

3 years ago

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

If f(x) = 3x^0 - 2x^-1 +4 then f(2)=

Assoli18 [71]

Answer:

try this link

Step-by-step explanation:

https://www3.nd.edu › WorkPDF

Web results

MATH 10550, EXAM 1 SOLUTIONS 1. If f(2) = 5, f(3) = 2, f(4) = 5, g(2 ...

6 0

3 years ago

Please help! It’s important!!

Vika [28.1K]

Answer:

option 3

Step-by-step explanation:

Since definition of slope is:

$slope = \frac{rise}{run}$

the ratio:

$\frac{bd}{da} = \frac{ce}{ea}$

explains the best (Ratio option 3)

5 0

2 years ago

A rectangle is 13 feet long and 4 feet wide. Find its area. help pls<br> Options are 48, 17, 52, 47

vladimir2022 [97]

Answer:

52 ft^2

Step-by-step explanation:

To find the area you just multiply 13 feet (length) by 4 feet (width). This gives you 52 feet squared because we are dealing with area and square feet.

4 0

2 years ago

Read 2 more answers