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tatiyna
3 years ago
11

Finding the Area of a Triangle

Mathematics
1 answer:
nignag [31]3 years ago
8 0

Answer: 1, 3, 6

Step-by-step explanation:

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Alana was working out on the treadmill. she worked out for 15 minutes. part of the time she was walking at 3.1 miles per hour. t
guapka [62]
Time taken for work out was 1/4 hours
let the time taken to walk be x
time spent for jogging will be (1/4-x)

distance=speed×time

distance walked will be:
3.1x miles

distance jogged will be:
5.2(1/4-x) miles

Total distance:
3.1x+5.2(1/4-x)=1.09

solving for x we get
3.1x-5.2x+1.3=1.09
2.1x=0.21
x=0.1
Thus time spent on waling was o.1 hours
time spent on jogging was 0.25-0.1=0.15 hours

3 0
4 years ago
Find the product of the given polynomials. <br> (5x + 8 – 6r) (4 + 2r – 7)<br><br><br>​
Inessa05 [86]

Answer:

-12r² + 10xr - 15x + 34r - 24

Step-by-step explanation:

1. Organize it, variables first - as well as adding constants such as 4 and -7

(5x - 6r + 8) (2r - 3)

2. Start by multiplying the 5x by (2r - 3), then -6r, followed by 8

(10xr - 15x) + (-12r^2 + 18r) + (16r - 24)

3. Simplify

10xr - 15x - 12r² + 18r + 16r - 24

4. Order by greatest to smallest factorial

-12r² + 10xr - 15x + 18r + 16r - 24

5. Combine like variables

-12r² + 10xr - 15x + 34r - 24

6 0
3 years ago
Ricardo earned $52,000 last year. He just received a 3% salary increase. What is his new yearly salary?
Juli2301 [7.4K]
<h3>Answer:  53,560 dollars</h3>

=======================================================

Explanation:

Having the salary increase by 3% means we can use the multiplier 1.03

Think of it like 100% + 3% = 1 + 0.03 = 1.03

The new salary is 52,000*1.03 = 53,560 dollars

----------------

The slightly longer way to do this is to first figure out how much 3% of 52,000 is

3% of 52,000 = 0.03*52,000 = 1560

Ricardo earns $1560 more dollars on top of the salary of $52,000

So overall his new salary is $1,560 + $52,000 = $53,560

----------------

Personally, I prefer the first method because it's quicker and it allows for multiple percentage increases to chain together. It also could be used to chain in percentage decreases as well.

8 0
3 years ago
List the sample space for rolling two dice and finding the sum of the numbers. How many 8's are there in the sample space? [Assu
Reptile [31]
Using the given assumption, there are 3.

The sample space for rolling two dice and finding the sum is:

2   3   4   5   6    7 
3   4   5   6   7    8
4   5   6   7   8    9
5   6   7   8   9    10
6   7   8   9   10  11
7   8   9  10  11  12

From the sample space alone, there are 5.  However, since a 3 and a 5 is the same as a 5 and a 3, this means that 2, 6 is the same as 6, 2 as well; this takes 2 off of the 5, leaving us 3.
5 0
4 years ago
Is 44.65 equal to 44.650
Zina [86]
Yes it is. If you see any zero after the last number after a decimal point and then compare the same numbers but without the zero they are equivalent. 
4 0
3 years ago
Read 2 more answers
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