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rewona [7]
3 years ago
7

Ssment (S) ULU 2020 / 15 of 20

Mathematics
2 answers:
Alenkasestr [34]3 years ago
8 0

Answer:

D

(Please vote me Brainliest if this helped!)

Step-by-step explanation:

The angle shown is a right angle. Right angles have a total of 90°.

Therefore, I simply multiplied each answer by 4 because 4(x) = (answer).

A. 4 (14) = 56 + 42 = 98° ≠ 90° INCORRECT

C. 4 (10) = 40 + 42 = 82° ≠ 90° INCORRECT

B. 4 (16) = 64 + 42 = 106° ≠ 90° INCORRECT

D. 4 (12) = 48 + 42 = 90° = 90° CORRECT

An easier way to solve this problem is by simply just subtracting and dividing:

90 - 42 = 48

48 ÷ 4 = 12

bonufazy [111]3 years ago
6 0
The answer is D hdbxjxbnznznznxnxnsnsn
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8х + 5у = -7<br> — 7х + бу = — 4
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Answer: x = -0.2651 and y = -0.9759

Step-by-step explanation:

Solution by substitution method

8x+5y= -7

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Suppose,

8x+5y=-7→(1)

7x-6y=4→(2)

Taking equation (1), we have

8x+5y= -7

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Putting x= -5y-7 / 8

in equation (2), we get 7x-6y=4

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⇒x= -2.1205/8

⇒x= -0.2651

∴x= -0.2651 and y = -0.9759

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