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4 years ago

Find the sum.

Mathematics

1 answer:

Irina18 [472]4 years ago

7 0

Step-by-step explanation:

4x2 + 5x - 7 + 3 - 2x2 + 6x

Solving like terms

2x2 + 11x - 4

Option C is the correct answer

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A lamp sold for $17.60, which represented a 12% discount. What was the original price of the lamp

guajiro [1.7K]

1) Find the percentage difference between 12% and 100%.

100-12= 88%

1a) Put the percentage in its decimal form.

88%/100= 0.88

2) Divide 17.60 by 0.88

17.60/0.88= 20

Therefore, the original price of the lamp is $20.

Hope this helps!

8 0

3 years ago

Read 2 more answers

Greatest to least π^2/4, √4, 2.93

NemiM [27]

Answer:

2.93, √4, π^2/4

<em>Hope this helps</em>

<em>-Amelia</em>

4 0

3 years ago

Alguien me ayuda con esto?

lord [1]

Answer:

x=10

Step-by-step explanation:

10 a 8 son dos, entonces 14 ax es 4

3 0

3 years ago

Read 2 more answers

Which of the following logarithmic expressions are equivalent to ln sqrt xy +ln (x/e)? select all that apply

spayn [35]

Answer: Option d.

Step-by-step explanation:

It is important to remember the following proporties in order to solve the exercise:

$ln(a)+ln(b)=ln(ab)\\\\ln(a)-ln(b)=ln(\frac{a}{b})\\\\ln(a)^m=mln(a)\\\\ln(e)=1$

In this case you have this expression given in the exercise:

$ln(\sqrt{xy})+ln(\frac{x}{e})$

Since equivalent expression have always the same value, you can simplify the expression given in order to find an equivalent expression.

Therefore, applying the corresponding properties, you get the following equivalent expression (Remember that $\sqrt[n]{a^n}=a$ ):

$ln(\sqrt{xy})+ln(\frac{x}{e})=ln(\sqrt{xy})+ln(x)-ln(e)=ln(x\sqrt{xy})-1$

3 0

3 years ago

Convert 15 km per hour to meters per second

ipn [44]

1km = 1000m
1hr = 3600sec

Do proportions:
1km / 1000m = 15km / x
15000m = x

1hr = 3600sec

15000/3600 = 4.2m per second
Choice 4

6 0

3 years ago