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3 years ago

Show how 3/4 × 4 can be solved using repeated addition.

Mathematics

2 answers:

jek_recluse [69]3 years ago

7 0

Answer:

3/4 + 3/4 + 3/4 + 3/4 = 12/4 = 3

Step-by-step explanation:

3/4 * 4= 12/4 = 3

3/4 + 3/4 + 3/4 + 3/4 = 12/4

12/4 = 3

Andru [333]3 years ago

6 0

Answer:

3/4 + 3/4 + 3/4 + 3/4 = 3

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Solve 2x^2 + x - 4 = 0 <br> X2 +

damaskus [11]

Answer:

$\large \boxed{\sf \ \ x = -\dfrac{\sqrt{33}+1}{4} \ \ or \ \ x = \dfrac{\sqrt{33}-1}{4} \ \ }$

Step-by-step explanation:

Hello, please find below my work.

$2x^2+x-4=0\\\\\text{*** divide by 2 both sides ***}\\\\x^2+\dfrac{1}{2}x-2=0\\\\\text{*** complete the square ***}\\\\x^2+\dfrac{1}{2}x-2=(x+\dfrac{1}{4})^2-\dfrac{1^2}{4^2}-2=0\\\\\text{*** simplify ***}\\\\(x+\dfrac{1}{4})^2-\dfrac{1+16*2}{16}=(x+\dfrac{1}{4})^2-\dfrac{33}{16}=0$

$\text{*** add } \dfrac{33}{16} \text{ to both sides ***}\\\\(x+\dfrac{1}{4})^2=\dfrac{33}{16}\\\\\text{**** take the root ***}\\\\x+\dfrac{1}{4}=\pm \dfrac{\sqrt{33}}{4}\\\\\text{*** subtract } \dfrac{1}{4} \text{ from both sides ***}\\\\x = -\dfrac{1}{4} -\dfrac{\sqrt{33}}{4} \ \ or \ \ x = -\dfrac{1}{4} +\dfrac{\sqrt{33}}{4}$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

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3 years ago

7. What is 45% of 115? Show your work.

olchik [2.2K]

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Ket [755]

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masya89 [10]

Answer:

T=98W-115W+1840

Step-by-step explanation:

$98 per credit at Westside (W)

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Combined: if W=16-P

Total=98W+115(16-W)

T=98W-115W+1840

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2 years ago