All categories

3 years ago

Solve by substitution x-y=-11 y+7=-2x

Mathematics

1 answer:

Bess [88]3 years ago

4 0

x - y = - 11 .............( 1 )

y + 7 = - 2x ...............( 2 )

from equation ( 1 )

x - y = - 11

x = -11 + y ...........( 3)

putting x in equation ( 2 )

y + 7 = - 2 x

y + 7 = -2 ( -11 + y ) y + 7 = 22 - 2 y y + 2 y =22 - 7

3 y = 15 y = 15 / 3

putting value of y in equation 3

x = -11+ ( 13 /5 ) x = -33 /3 + 15 / 3 ( l.c.m)

x = -17 / 5

check

x = -11 + y

- 17 / 5 = -11 + 13 / 5

-17 /5 = -17 / 5

You might be interested in

Solve. j – (–14) = –20 a. -34 b.34 c.6 d.-6 Which one?

laiz [17]

The correct answer is A) -34. Hope this helps.

4 0

3 years ago

Read 2 more answers

) The manager of a local Gap store estimates that on average the probability of a customer entering the store and will purchase

xeze [42]

Answer: 1. 0.0256

2. 0.4096

Step-by-step explanation:

Binomial probability formula , to find the probability of getting x successes:

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where n= Total number of trials

p= Probability of getting success in each trial.

Let x be the number of customers will make purchase.

As per given , we have

p= 0.20

n= 4

1. The probability that 3 of the next 4 customers will make a purchase will be:-

$P(x=3)=^4C_3(0.20)^3(1-0.20)^{4-3}$

$P(x=3)=(4)(0.20)^3(0.80)^{1}\ \ [\because\ ^nC_{n-1}=n]$

$P(x=3)=(4)(0.008)(0.80)=0.0256$

Hence, the probability that 3 of the next 4 customers will make a purchase = 0.0256

2. The probability that none of the next 4 customers will make a purchase will be :

$P(x=0)=^4C_0(0.20)^0(1-0.20)^{4-0}$

$P(x=0)=(1)(0.80)^{4}\ \ [\because\ ^nC_{0}=1]$

$P(x=0)=0.4096$

Hence, the probability that none of the next 4 customers will make a purchase= 0.4096

5 0

3 years ago

WILL GIVE BRAINLIEST AND 20 POINTS! Find m∠AOC given x = 167° and y = 20°.

pentagon [3]

Answer:

187*

Step-by-step explanation:

167 plus 20 is 187

hope this helps

6 0

3 years ago

Read 2 more answers

15 + 4x = 12 + x nm jjk kj k j jk kj k kj kjkj

Marta_Voda [28]

Answer:

x = −1

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

M= 2²×3×5² N=2³×3²×7 find the largest Number that divides exactly into M and N

nevsk [136]

Answer:

Step-by-step explanation:

just find the HCF, which will be

2² × 3 = 12

5 0

1 year ago