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2 years ago

Please help me !! thank you all

Mathematics

1 answer:

Finger [1]2 years ago

8 0

Ok so basically.... 15^2= 9^2+ x^2

15*15

225= 81+x
-81. -81

144=x^2

12=X

Im pretty sure it’s right!
I used the formula A^2+B^2=C^2

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(i) 809, 708, 607, _____, _ class 4<br>__class 4

schepotkina [342]

Answer:

809, 708, 607, 506, 405, 304, 203, 102, 1, -100

Step-by-step explanation:

809, 708, 607, _____, _______

First term = 809

Second term = 708

Third term = 607

Difference between first term and second term = 809 - 708

= 101

Difference between second term and third term = 708 - 607

= 101

Therefore, the common difference is 101

Fourth term = 607 - 101

= 506

Fifth term = 506 - 101

= 405

Sixth term = 405 - 101

= 304

Seventh term = 304 - 101

= 203

Eighth term = 203 - 101

= 102

Ninth term = 102 - 101

= 1

Tenth term = 1 - 101

= - 100

809, 708, 607, 506, 405, 304, 203, 102, 1, -100

4 0

2 years ago

Pls tell me some answers for this

devlian [24]

Answer:

∠B ≈ 56.25°

Step-by-step explanation:

Since the triangle is right use the cosine ratio to solve for B

cosB = $\frac{adjacent}{hypotenuse}$ = $\frac{BC}{AB}$ = $\frac{5}{9}$ , thus

B = $cos^{-1}$ ( $\frac{5}{9}$ ) ≈ 56.25°

3 0

2 years ago

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Which expression represents the calculation “add 5 and 6, then multiply by 3"?

Anarel [89]

(5 + 6)3 would represent what you want.

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Which function is linear? Select all that apply.

rjkz [21]

Answer:

C and D

Step-by-step explanation:

I'm guessing the 3 in A and B are exponents, only equations with an highest exponent of 1 is linear

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6X plus 3Y equals 3 3x minus Y equals four

Delvig [45]

Answer:

Step-by-step explanation:

6x + 3y = 3 simplify by dividing both sides by 3 2x + y = 1

3x - y = 4 the 1st equation has a positive y, the 2nd has a negative y. Use elimination

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2x + y = 1

3x - y = 4

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5x = 5 solve

X = 1 substitute back in to one of the original equations to find y

3x - y = 4

3(1) - y = 4

- y = 1

y = -1 (1,-1)

8 0

2 years ago