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3 years ago

What is the coefficient of the variable in the expression 2 - 5x - 4 + 8

Mathematics

1 answer:

Vinvika [58]3 years ago

3 0

The coefficient is the number next to the variable, in this case it is 5

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(a) I'm pretty sure it's $71.75

(b) the total would be $771.75 if i calculated it right...

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3 years ago

What is the equation of the line in slope intercept form?

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y=3/5x+3

Step-by-step explanation:

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3 years ago

Solve: 10(1 – 2y) = –5(2y – 1)

FinnZ [79.3K]

Answer:

Y= 1/-2

Step-by-step explanation:

10(1-2y)=5(2y-1)

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4 years ago

A lighthouse is 90 feet tall. A scale model of the lighthouse has a scale of 1 in: 6 ft. How tall is the model of the lighthouse

makkiz [27]

Answer:

15 inches tall

Step-by-step explanation:

To solve I would set up a ratio to visualize the question.

x in : 90 ft

1 in : 6ft

Then divide... 90 ÷ 6 = 15 ( this is the inches in the ratio that compares to 90 ft).

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3 years ago

Given that k-5, k+7, k+55 are three consecutive terms in a geometric sequence, solve for k

choli [55]

Answer:

$k = 9$

Step-by-step explanation:

Given:

Consecutive Terms: k-5, k+7, k+55

Required:

Determine the value of k

To do this, we make use of the concept of common ratio.

The common ratio (r) of a geometric sequence is:

$r = \frac{T_{n}}{T_{n-1}}$

In other words:

$r = \frac{T_3}{T_2} = \frac{T_2}{T_1}$

Where 1, 2 and 3 represents the terms of the progression/sequence

So:

$r = \frac{T_3}{T_2} = \frac{T_2}{T_1}$ becomes

$\frac{k+55}{k+7} = \frac{k+7}{k-5}$

Cross Multiply:

$(k+55)(k-5) = (k+7)(k+7)$

Open Brackets

$k^2 + 55k - 5k - 275 = k^2 + 7k + 7k + 49$

$k^2 + 50k- 275 = k^2 + 14k + 49$

Collect Like Terms

$k^2 - k^2 + 50k-14k = 275 + 49$

$36k = 324$

Solve for k

$k = 324/36$

$k = 9$

5 0

4 years ago