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3 years ago

7

Mr.Ruiz writes the expression 5x(2+1)2 / 3 on the board. Chelsea says the first step evaluate 12. Explain Chelsea’s mistake. The

n, evaluate the question.

1 answer:

Nat2105 [25]3 years ago

7 0

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Mrs Naidu bought $155 in groceries. she paid her bill with $5 and $20 notes using a total of 13 notes. calculate how many of eac

andriy [413]

Answer:

6 x £20 notes, 7 x £5 notes

Step-by-step explanation:

6 x £20 = £120

7 x £5 = £35

£130 + £35 = £155

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3 years ago

Which part of the algebraic expression 3 + 7d is the coefficient?

juin [17]

Answer:

your answer is 7 the coefficient is the number before the variable

4 0

3 years ago

Can anyone start me off on this? its trigonometric ratios

Alexxx [7]

Answer:

The angle is about 30.27 degrees.

Step-by-step explanation:

Use the trig ratio cosine because you are given the adjacent leg and the hypotenuse.

$cos^{-1} =19/22$

Plug into a calculator

Rounded to the nearest hundredth the angle is 30.27 degrees.

5 0

3 years ago

Right triangles to find the exact length of:<br> T<br> 30°<br> 14 in<br> a) TI = in<br> 60°<br> R

ira [324]

<h3>Answer:</h3>

a) TI = 7√3 in

b) IR = 7 in

<h3>Explanation:</h3>

<u>Using cosine rule</u>:

$\sf cos(x) = \dfrac{adjacent}{hypotenuse}$

$\hookrightarrow \sf cos(30) = \dfrac{TI}{14}$

$\hookrightarrow \sf TI = 14cos(30)$

$\hookrightarrow \sf TI = 7\sqrt{3}$

<u>Using sine rule</u>:

$\sf sin(x) = \dfrac{opposite}{hypotenuse}$

$\hookrightarrow \sf sin(30) = \dfrac{IR}{14}$

$\hookrightarrow \sf IR = 14sin(30)$

$\hookrightarrow \sf IR = 7$

5 0

2 years ago

The temperature is 8°F. It is expected to fall at 5° each hour for the next several hours. In how many hours will the temperatur

Natalija [7]

Answer:3 hours

Step-by-step explanation:8-5=3, 3-5=-2, -2-5=-7

7 0

3 years ago

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