All categories

3 years ago

One step equations 7r= - 7/2

1 answer:

7 0

7r = - $\frac{7}{2}$ Divide both sides by 7 ( $-\frac{7}{2} \div 7 = -\frac {7}{2} x \frac {1}{7}$ )
r = $-\frac{14}{2}$ Simplify
r = -7

You might be interested in

The cost of 4 ice cream cones from the snack bar was $10.40. If each ice cream cone costs the same amount, which model

Gnom [1K]

Answer: each cone costs $2.60 because $10.40 divided by 4 is $2.60

Step-by-step explanation:

6 0

3 years ago

Multiply -1/2 c(4c -2) Please ASAP

nalin [4]

Answer:

-2c^2 + c

Step-by-step explanation:

5 0

3 years ago

Of all customers purchasing automatic garage-door openers, 75% purchase Swedish model. Let X = the number among the next 15 purc

Lelechka [254]

Answer:

$P(X=k) = {15 \choose k} * 0.75^{k}*0.25^{15-k}$

For any integer k between 0 and 15, and 0 for other values of k.

$P(X>10) = 0.2252+ 0.2252+ 0.1559+0.0668+0.0134 = 0.6865$

c) P(6 ≤ X ≤ 10) = 0.2737

d) μ = 15*0.75 = 11.25. σ² = 11.25*0.25 = 2.8125

Step-by-step explanation:

X is a binomial random variable with parameters n = 15, p = 0.75. Therefore

$P(X=k) = {15 \choose k} * 0.75^{k}*0.25^{15-k}$

For any integer k between 0 and 15, and 0 for other values of k.

P(X>10) = P(X=11) + P(X=12)+ P(X=13)+P(X=14)+P(x=15)

$P(X=11) = {15 \choose 11} * 0.75^{11} * 0.25^4 = 0.2252$

$P(X=12) = {15 \choose 12} * 0.75^{12} * 0.25^3 = 0.2252$

$P(X=13) = {15 \choose 13} * 0.75^{13} * 0.25^2 = 0.1559$

$P(X=14) = {15 \choose 14} * 0.75^{14} * 0.25 = 0.0668$

$P(X=15) = {15 \choose 15} * 0.75^{15} = 0.0134$

Thus,

$P(X>10) = 0.2252+ 0.2252+ 0.1559+0.0668+0.0134 = 0.6865$

c) P(6 ≤ X ≤ 10) = P(X = 6) + P(X = 7) + P(X = 8) + P(X=9) + P(X=10)

$P(X=6) = {15 \choose 6} * 0.75^{6} * 0.25^9 = 0.0034$

$P(X=7) = {15 \choose 7} * 0.75^{7} * 0.25^8 = 0.0131$

$P(X=8) = {15 \choose 8} * 0.75^{8} * 0.25^7 = 0.0393$

$P(X=9) = {15 \choose 9} * 0.75^{9} * 0.25^6 = 0.0918$

$P(X=10) = {15 \choose 10} * 0.75^{10} * 0.25^{5} = 0.1652$

Thereofre,

$P(6 \leq X \leq 10) = 0.0034 + 0.0134 + 0.0393 + 0.0918 + 0.1652 = 0.2737$

d) μ = n*p = 15*0.75 = 11.25

σ² = np(1-p) = 11.25*0.25 = 2.8125

3 0

3 years ago

[PLEASE HELP BEEN ON THIS FOR HOURS :(] Betty mixed 1 1/2 gallons of yellow paint with 2 1/2 gallons of blue paint to make green

Ne4ueva [31]

Answer:

3 gallons of Yellow paint hope it helps :)

Step-by-step explanation:

7 0

4 years ago

Find the measure of angle 1, given that AB || CD

kozerog [31]

M<A = 180 -110
m<A = 70

m<1 = m<A = 70

answer is A. 70 first choice

3 0

4 years ago