3 years ago

6 Jenna bought n notebooks which cost 5 dollars each, and 3 pens which cost r dollars each. How much money did she spend?

Mathematics

1 answer:

lana66690 [7]3 years ago

8 0

The answer should be 5n+3r

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An 8-ounce box of Crispy Crackers costs $1.59 and a 32-ounce box costs $6.79. Which box is the better buy?

kozerog [31]

Answer:

8 oz for 0.20/oz

Step-by-step explanation:

1.59 divided by 8 is =0.198

That rounds to 0.20.

The cost of an 8-ounce box of Crispy Crackers is 0.20/oz.

32 divided by 6.79 = 4.71

The cost of a 32-ounce box cost is 4.71/oz

0.20 < 4.71

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3 years ago

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Elena L [17]

126
Explanation
18/-3-(-12)•(-1)•(-11)
divide 18 by -3 and change signs on the 12
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3 years ago

What is the true solution to the equation below? 2 in e in2×-in e in 10×= in 30 A x=30 B x=75 C x=150 D x=300

hodyreva [135]

Answer:

Option B.

Step-by-step explanation:

Let as consider the given equation:

$2\ln e^{\ln 2x}-\ln e^{\ln 10x}=\ln 30$

It can be written as

$2(\ln 2x)-(\ln 10x)=\ln 30$ $[\because \ln e^a=a]$

$\ln (2x)^2-(\ln 10x)=\ln 30$ $[\because \ln a^b=b\ln a]$

$\ln \dfrac{4x^2}{10x}=\ln 30$ $[\because \ln \dfrac{a}{b}=\ln a-\ln b]$

$\ln \dfrac{2x}{5}=\ln 30$

On comparing both sides, we get

$\dfrac{2x}{5}=30$

Multiply both sides by 5.

$2x=150$

Divide both sides by 2.

$x=75$

Therefore, the correct option is B.

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4 years ago

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motikmotik

He owes less than $8

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3 years ago

800.5x(2x20to the 6 power

olasank [31]

Answer:

800.5×(2×20)=32020

Step-by-step explanation:

800.5×40=32020

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3 years ago