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3 years ago

Why do you sometimes need to regroup in 3 digit addition problems

1 answer:

6 0

Because for example 349+567 is something you need to regroup.You start by the ones.9+7=16. You don't always need to regroup though

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For the triangles to be similar by the sss similarity theorem what must be the value of y 18 20 24 26

Ludmilka [50]

Answer:

Step-by-step explanation:

The picture of the question in the attached figure

we know that

If the figures are similar by SSS Similarity Theorem, then the ratio of its corresponding sides must be proportional

$\frac{PQ}{AB}=\frac{PR}{AC}$

substitute the given values

$\frac{y}{10}=\frac{28}{14}$

solve for y

$y=10(2)\\y=20\ units$

5 0

3 years ago

Jacob is selling candy bars for his basketball team he already sold 23 but he wants to sell 200 he is able to sell 15 per day ho

Nataly_w [17]

Answer:

$11.8 days$

Step-by-step explanation:

Given:

Sales per day: 15 candy bars

Goal: 200 candy bars

Already sold: 23 candy bars

With this information, we can set up an equation to find out how many days it will take him to reach his goal.

Let d = days; solve for $d$ .

$15d + 23 = 200$

$15d=177$

$d=11.8$

In conclusion, it will take Jacob 11.8 days to reach his goal of 200 candy bars.

3 0

4 years ago

Help ASAP!! No bots!!!

arlik [135]

Answer:

A, D, F

Hope it helps!

3 0

3 years ago

State 2 advantages of thermal expansion

enot [183]

Answer:

Adaptable Refrigerant Flow.

Keeps the Evaporator Active and in Optimal Performance.

Higher Power Efficiency.

Eliminates Risk of Compressor Breakdown.

Handles Variation in Refrigerant Charge.

Better Temperature Control.

6 0

3 years ago

9. A band director wants to form a committee of 4 parents from a list of 45 band parents.

Alex73 [517]

Answer:

Part (A): The number of ways to select 12 jurors are 86493225.

Part (B): The number of ways to select 2 alternates are 306.

Part (C): Part (a) is an example of combination and Part (a) is an example of permutation

Step-by-step explanation:

Consider the provided information.

A band director wants to form a committee of 4 parents from a list of 45 band parents.

Part (A): How many different groups of 4 parents can the band director select?

Since order doesn't matter so we will use combination.

Use the formula for combination $^{n}C_{r}=\frac{n!}{r!(n-r)!}$

Substitute n=45 and r=4 in above formula.

$^{45}C_{4}=\frac{45!}{4!(45-4)!}$

$^{45}C_{4}=\frac{45!}{4!41!}$

$^{45}C_{4}=148995$

Hence, the number of ways are 148995.

Part (B) How many different ways can the band director select 4 parents to serve in the band parents’ association as president, vice president, treasurer, and secretary?

Since the order matter so we will use permutation:

The formula for permutation is: $^{n}P_{r}=\frac{n!}{(n-r)!}$

Substitute n=45 and r=4 in above formula.

$^{45}P_{4}=\frac{45!}{(45-4)!}$

$^{45}P_{4}=\frac{45!}{41!}$

$^{45}P_{4}=3575880$

Hence, the number of ways are 3575880.

Part (C) . Explain the difference between parts (a) and (b) in terms of how you decided to solve each part.

Part (A) is an example of number of combination where order doesn't matter.

Part (B) is an example of permutation where order matter.

7 0

3 years ago