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deff fn [24]
3 years ago
12

Mathematics 10 points and brainliest.

Mathematics
2 answers:
pentagon [3]3 years ago
7 0

Answer:

41

Step-by-step explanation:

8 x 7 - 5 (3^{2} - 6)

= 8 x 7 - 5 ( 9 - 6 )

= 8 x 7 - 5 x 3

= 56 - 15

= 41

stellarik [79]3 years ago
5 0

Answer:

41

Step-by-step explanation:

Use PEMDAS.

3^2 = 9

9 - 6 = 3

3 × 5 = 15

8 × 7 = 56

56 - 15 = 41

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Step-by-step explanation:

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3 years ago
It takes Alexandra 2 hours and 44 minutes to cut the grass. Austin needs 3 hours and 14 minutes to cut the grass. If they work t
Vedmedyk [2.9K]
For problems such as this, it can be handy to remember that
.. 1/(1/a +1/b) = ab/(a +b)

The time required to do a job is the inverse of the rate at which the job is done. Rates are added when people work together (in math problems, not in real life).

(2:44)*(3:14)/(2:44 +3:14) = 1:28:52.3

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2:44 = 41/15 hours = 82/30 hours
3:14 = 97/30 hours
Using the formula above, we have a "working together" time of
.. (82/30)*(97/30)/(82/30 +97/30) = 82*97/(30*179) = 3977/2685 . . . hours
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Learn to use the fraction functions on your calculator. They can be very helpful.
6 0
4 years ago
A recipe uses 5 cups of milk to make 10 servings. If the same amount of milk is used for each serving, how many servings can be
kodGreya [7K]
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4 0
3 years ago
Read 2 more answers
The safety instructions for a 20 foot ladder say the ladder should not be inclined more than 70 degrees with the ground. suppose
Romashka [77]

Answer: the distance of the base of the house to the foot of the ladder is 6.84 feet

Step-by-step explanation:

The scenario is shown in the attached photo.

Right angle triangle ABC is formed when the ladder leans against the wall of the house.

AC = the height of the ladder

AB = x feet = distance of the base of the house to the foot of the ladder

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To determine x, we will apply trigonometric ratio

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Where

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4 0
4 years ago
Name the identical triangles and measurement of side BA
aalyn [17]

Step-by-step explanation:

BE/BC=BD/BA

tHE TWO SIMILAR TRIANGLES ARE BED AND BC. tHE PROPORTION ABOVE REPRESENTS USE OF THE TWO SIMILAR TRIANGLES.

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4x = 50 divide by 4

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4 0
3 years ago
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