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Bezzdna [24]
3 years ago
7

A and B are complementary angles. If A = (x + 9) and m B = (7x – 15)° then find the measure of B.​

Mathematics
1 answer:
Marina CMI [18]3 years ago
3 0

Answer:

coplementary \: angles \:  = 90° \\ (x + 9)° + (7x - 15)° = 90° \\ (8x  - 6)° = 90° \\ 8x = 90  + 6 \\ 8x = 96° \\ x = 12\\ angle \: B.  = ((7 \times 12)- 15) \\  = 69°

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Which set is the subset of every set
just olya [345]
The empty or null set.
4 0
3 years ago
Read 2 more answers
Standard form of 6,32,94,000
madam [21]

Answer:

6.3294✖️10^7

Step-by-step explanation:

To find the statdard form, you place the decimal after the largest unit, int his case 6.

Then you write down all the numbers except for "0".

This becomes:

6.3294

Then, you add the multiplying sign, and count how many digits are there after 6, and in this case, there are 7, so you add the power "7" after 10.

6.3294✖️10^7

Hope this helped!

Have a nice day:)

7 0
3 years ago
Lucy’s savings account has 35% more money than her sister Edy’s. Together, the girls have saved a total of $206.80. How much mon
kramer
Let Edy's money be x.

Lucy: 35% more --- (135/100) x

x + (135/100) x = 206.80
(47/20)x = 206.80
47x = 206.8 x 20
47x =4136
x = 88

Edy saved $88.
Lucy saved (135/100)(88) = $118.80
7 0
3 years ago
Jayden sells snow cones for $3.75 each. He started the day with a total of 300 snow cones to sell. If he made a total of $843.75
Leni [432]

Number of cone left is 75 cone

<u>Given that;</u>

Cost of each cone = $3.75 each

Starting number of cone = 300

Total amount earn = $843.75

<u>Find:</u>

Number of cone left

<u>Computation:</u>

Number of cone sale = Total amount earn / Cost of each cone

Number of cone sale = 843.75 / 3.75

Number of cone sale = 225 cone

Number of cone left = Starting number of cone - Number of cone sale

Number of cone left = 300 - 225

Number of cone left = 75 cone

Learn more:

brainly.com/question/4115571?referrer=searchResults

7 0
3 years ago
There are two calculus classes at your school classes have a class average of 75.5 the first class as a standard deviation of 10
DENIUS [597]
To compare the two classes, the Coefficient of Variation (COV) can be used.

The formula for COV is this:
C = s / x

where s is the standard deviation and x is the mean

For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)

For the second class:
C2 = 22.5 / 75.5
C2 = 0.2980 (29.80%)

The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
8 0
3 years ago
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