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Oksanka [162]
3 years ago
11

Help me solve this question please.

Mathematics
1 answer:
pantera1 [17]3 years ago
3 0
The answer is D. 9(y + 3) and 27 + 9y because 9(y + 3) when expanded is 9y + 27. I hope this helps!
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3. Today, Dahlia folded 29 paper cranes. Now there are 41 paper cranes in class. How many cranes were there in class yesterday?
ohaa [14]

Answer:

There were 12 cranes in class yesterday. For all the cranes, there were a total of 290 centimeters.

Step-by-step explanation:

41-29=12.

29*10=290

4 0
2 years ago
Select the two values of x that are roots of this equation.<br> 2x-5=-3x2
anygoal [31]

Answer:

Step-by-step explanation:

4 0
2 years ago
Steve opened a bank account.he plans to deposit $35 every month.write an equation that models the total amount of money,t,deposi
zimovet [89]
35m because 35 dollars multiplied by m months
7 0
3 years ago
A random sample of 500 army recruits has a mean height of 68 inches with a standard deviation of 2.5 inches. If a 95% confidence
GaryK [48]

Answer:

0.22

Step-by-step explanation:

Sample given is 500, so use z-score for the critical value

Given 95% confidence interval;

∝=100-95 =5% =0.05

∝/2 = 0.05/2 =0.025 ----because you are interested with one tail area

1-0.025= 0.975 -----area to the left

proceed to z-table to read 0.975 = 1.96 as the critical value

standard deviation from the question is 2.5 but because this is a sample then;

standard error for the mean is= standard deviation/√sample= 2.5/√500

=0.1118

Margin of error=1.96*0.1118 =0.2191

3 0
3 years ago
Solve for x: 5|2x − 2| + 8 = 18.
Tju [1.3M]
Remember
|x| makes x posotive
5|2x-2|+8=18
minus 8 both sides
5|2x-2|=10
divide both sides by 5
|2x-2|=2
assume
2x-2=2 and 2x-2=-2

2x-2=2
add 2
2x=4
divide 2
x=2

2x-2=-2
add 2
2x=0
x=0


x=0 or x=2


3rd choice
5 0
4 years ago
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