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zvonat [6]
3 years ago
9

2d+4=10+2.5d Help Me

Mathematics
1 answer:
sergiy2304 [10]3 years ago
6 0
Subtract 2d from both sides

simplify 10 + 2.5d - 2d to 10 + 0.5d

subtract 10 from both sides

simplify 4 - 10 to -6

divide both sides by 0.5

simplify 6/0.5 to 12

switch the sides

Answer: d = -12.
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What is the sum of the first seven terms of the geometric series 2 - 10 +50 -...?
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Answer:

26042.

Step-by-step explanation:

What's the first term of this geometric series?

2.

What's the common ratio of this geometric series?

Divide one of the terms with the previous term. For example, divide the second term -10 with the first term 2.

\displaystyle r = \frac{-10}{2} = -5.

What's the sum of this series to the seventh term?

The sum of the first n terms of a geometric series is:

\displaystyle a_1 \cdot \frac{1-r^{n}}{1-r},

where

  • a_1 is the first term of the series,
  • r is the common ratio of the series, and
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\displaystyle 2 \times\frac{1- (-5)^{7}}{1- (-5)}=26,042.

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4 years ago
Suppose in a certain state, 60% of the people have a Visa credit card, 40% have a MasterCard, and 24% have both. Let V be the ev
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Answer:

The question has some details missing; i.e

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b. What is the probability that the shopper has both types of card?

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Step-by-step explanation:

The detailed steps is shown in the attachment.

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3 years ago
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Simplify 32^-1/5 Thanks in advance!!!
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Fractional index means "xth root of". Negative index means a fraction. So together, what it really means is:

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she surveyed "x" amount, which is the 100%, but we also know that 180 is the 37.5%, so


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3 years ago
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