What does 21÷3+(3×9)×9+5 equal? show work below plz

Mathematics

2 answers:

igor_vitrenko [27]3 years ago

6 0

3x9=27
21/3 = 7
so
7+27x9+5
27x9=243
243+7+5
answer is 255

Bumek [7]3 years ago

5 0

21 divided by 3 = 7

+(9x3)=34 x 9+5= 34 x 14 =476

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2 years ago

Simplify the following expression.

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Step-by-step explanation:

<u>Step 1: Add the numbers: 9.5 +6.2 = 15.7</u>

$=8.6\left(15.7-3.5^2\right)$

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$=8.6\left(15.7-12.25\right)$

<u>Step 2: Subtract the numbers: 15.7 - 12.25 = 3.45</u>

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<u>Step 3: Multiply the numbers: 8.6 × 3.45 = 29.67</u>

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- To solve this equation, the first step is to add the numbers 9.5 + 6.2 into the equation and it will lead to 15.7 as the number for step one.

- To solve this equation, the second step is to subtract the numbers 15.7 - 12.25 into the equation and it will lead to 3.45 as the answer.

- To solve this equation, the third step is to multiply the numbers 8.6 x 3.45 into the equation and it will lead 29.67 as the final answer for the whole equation.

Answer:

$=29.67$

Hope this helps.

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2 years ago

Solve x42=37 x 42 = 3 7 using two different strategies. Explain each strategy.

Dafna11 [192]

Given equation : $\frac{x}{42}=\frac{3}{7}$ .

Strategy 1: We can cross mutiply both sides remove fraction form.

On cross multiplication, we get

x * 7 = 3 * 42

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Dividing both sides by 7, we get

Strategy 2: We can find least common denominator(lcd) of both sides and multiplying both sides by that lcd to get rid denominators from both sides.

LCD of 42 and 7 is 42.

Therefore, multiplying both sides by 42, we get

$42\times \frac{x}{42}=42\times\frac{3}{7}$