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3 years ago

8

Maria bought some apples. She gave 3 apples to her friends. Write an algebraic expression that shows how many apples Maria has l

eft

1 answer:

zavuch27 [327]3 years ago

8 0

Answer:

x-3

Step-by-step explanation:

x-3 x because we don't know the number of apples she has so you put a letter then -3 because 3 apples are given away

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Evaluate the following expressions given x=6 and y=-3

Nana76 [90]

a.

$\purple{5 \times 6 - 4 \times ( - 3)}$

$= 30 + 12$

$\blue{ = \boxed{42}}$

b.

$\purple{ {6}^{2} + \frac{6}{ - 3} }$

$= 36 - 2$

$\blue{ = \boxed{34}}$

c.

$\purple{(6 - 5 {)}^{3} + {( - 3)}^{2} }$

$= {1}^{3} + 9$

$= 1 + 9$

$\blue{ = \boxed{10}}$

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Hope it helps

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2 years ago

5. A baseball player earns $2,913 for each game

ser-zykov [4K]

Answer:

471,906

Step-by-step explanation:

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2 years ago

If n and k are positive integers, is n divisible by 6 ? (1) n = k(k + 1)(k – 1) (2) k – 1 is a multiple of 3.

xz_007 [3.2K]

Answer: yes, it is

Step-by-step explanation:

A number is divisible by 6 if it is divisible by 2 and 3 simultaniously.

n = k(k+1)(k-1)

If k-1 is a multiple of 3, n is divisible by 3, so one of the requirements is ok.

Now, if k-1 is a multiple of 3, it can be even or odd.

if k-1 is even, then it is divisible by 2 and as it is divisible by 3 as well, n is divisible by 6

if k-1 is odd, then k and k+1 is even, hence, divisible by 2.

As n = k(k+1)(k-1), n is also divisible by 6.

4 0

3 years ago

Find the cosine of angle B.

Alexandra [31]

$\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }$

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9² = 12² + 15² - 2 (12) (15) cos (B)

81 = 144 + 225 - 360 cos(B)

81 = 369 - 360 cos (B)

360 cos (B) = 369 - 81

360 cos (B) = 288

cos (B) = 0.8

-

Answer: Cosine B = 0.8

-

$\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }$

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12² = 15² + 9² - 2 (15)(9) cos (A)

144 = 225 + 81 - 270 Cos A

144 = 306 - 270 Cos A

270 Cos A = 162

Cos A = 3/5 or 0.6

-

Answer: Cosine Angle A = 3/5

4 0

3 years ago

On a coordinate plane, a polygon has points (negative 3, 4), (3, 4), (3, negative 3), (negative 3, negative 2).

alexandr1967 [171]

Answer:

(-3,-2)

(-3,4)

(3,4)

(3,-3)

Step-by-step explanation:

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2 years ago

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