3 years ago

The product of some negative number and 4 less than twice that number is 240. Find the number

Mathematics

1 answer:

nata0808 [166]3 years ago

3 0

I think the answer is 122

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What is the value of 8(15-4)/4^2-5

kolbaska11 [484]

Answer: 0.5

Step-by-step explanation:

Android calculator accepts the above question via copy and paste, and gives 0.5

The point of this question is to try to discover whether or not you know what the expression means.

Rewriting it as (8(15-4)/(4×4)) - 5 would show that you know the meaning. You can check that by feeding it into the calculator as well.

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3 years ago

How do I find a2 and a3 for the following geometric sequence? 54, a2, a3, 128

vlada-n [284]

The formula for the nth term of a geometric sequence:
$a_n=a_1 \times r^{n-1}$
a₁ - the first term, r - the common ratio

$54, a_2, a_3, 128 \\ \\
a_1=54 \\
a_4=128 \\ \\
a_n=a_1 \times r^{n-1} \\
a_4=a_1 \times r^3 \\
128=54 \times r^3 \\
\frac{128}{54}=r^3 \\ \frac{128 \div 2}{54 \div 2}=r^3 \\
\frac{64}{27}=r^3 \\
\sqrt[3]{\frac{64}{27}}=\sqrt[3]{r^3} \\
\frac{\sqrt[3]{64}}{\sqrt[3]{27}}=r \\
r=\frac{4}{3}$

$a_2=a_1 \times r= 54 \times \frac{4}{3}=18 \times 4=72 \\
a_3=a_2 \times r=72 \times \frac{4}{3}=24 \times 4=96 \\ \\
\boxed{a_2=72, a_3=96}$

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3 years ago

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PLEASE HELP I WILL GIVE BRAINLIEST NO RANDOM ANSWER PLEASE

Pavlova-9 [17]

14th term is the answer bro

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MAXImum [283]

$\huge \purple{\tt{Answer:}}$