Answer:
19) n = -14
20) x = 4
21) b= -14
22) x = 2
23) x = -1
24) x = -9
Step-by-step explanation:
19) Use the distributive property to get rid of the parentheses. You will get: 20-4n = 76. So, n = -14.
20) Multiply both sides of the equation by 2 to get: -8 + x = -4. So, x = 4
21) Add 3 to both sides to get: 
= -1. So, b = -14
22) Use the distributive property to get rid of the parentheses. You will get: -40 - 5x = -50. Then, add 40 to both sides to get: -5x = -10. So, x = 2.
23) Use the distributive property to get rid of the parentheses. You will get: -72 = -64 + 8x. Then, add 64 to both sides to get: -8 = 8x. So, x = -1
24) Add 2 to both sides to get: 
= -3. So, x = -9
Hope this helps :)
20✔️3 + 4✔️27
20✔️3 + 4✔️9 • 3
20✔️3 + 4 • 3 ✔️3
20✔️3 + 12✔️3
32✔️3.
The solution is 32✔️3.
Complete Question
The complete question is shown on the first uploaded image
Answer:
Option A is correct
Step-by-step explanation:
From the question we are told that
The 95% confidence interval of the mean score of all New Jersey third graders is (58.957 , 63.043)
The sample size is n = 184
The sample average is 
The standard deviation is 
The 90% confidence interval for the difference in mean score between lowa and New Jersey is (-6.33 , -1.67 )
The p-value is 
Generally given that the p-values is very low compared to the level of significance (100 -90 = 10% = 0.10 ) we can reject the null hypothesis which is usually a claim that the means of the population are the same )
Hence the population means are different .
Answer:
you would start out with 90 because 90-12 = 78
so the equation could be
A= 90
A-12+5= Ashley's final score
Step-by-step explanation:
Answer:
a) 6r + 3
b) 8 + 4d
c) -2mn
d) 6s - 10
Step-by-step explanation:
a) 2r + 3 + 4r
We need to add the like terms
= 2r + 4r + 3
= 6r + 3
b) 8 + 3d + d
We need to add the like terms
= 8 + 3d + d
= 8+4d
c) mn + (–3mn)
We need to add the like terms
= mn - 3mn
= -2mn
d) 10s + (–10) + (–4s)
We need to add the like terms
= 10s –10 –4s
= 10s - 4s - 10
= 6s - 10
