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4 years ago

Let f(x) = 8x - 7 what is f(4) A. 25 B. 36 C.39 D. 32

Mathematics

2 answers:

NeTakaya4 years ago

6 0

A. 25

8x4=32
32-7=[25]

alexgriva [62]4 years ago

6 0

Replace the x by 4 and perform the calculation:_

f(4) = 8(4) - 7 = 32 - 7 - 25

Ita A

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Water is added or drained from a tank each day. The first day, 910 of a gallon is added to the empty tank. The second day, 710 o

dimulka [17.4K]

Answer:

The quantity of water in the tank after 15 days is 1610.0 gallons OR 1.61 × 10³ gallons.

Step-by-step explanation:

The amount of water in the tank after 15 days is given by the series

910+(−710)+810+(−610)+⋯+310+(−110)+210

From the series, we can observe that, if water is added for a particular day then water will be drained the following day.

Also, for a day when water is to be added, the quantity to be added will be 100 gallon lesser than the quantity that was last added. Likewise, for a day when water is to be drained, the quantity to be drained will be 100 gallons lesser than the quantity that was last drained.

Hence, we can complete the series thus:

910+(−710)+810+(−610)+710(-510)+610(-410)+510(-310)+410(-210)+310+(−110)+210

To evaluate this, we get

910-710+810-610+710-510+610-410+510-310+410-210+310-110+210

= 1610.0 gallons

Hence, the quantity of water in the tank after 15 days is 1610 gallons OR 1.61 × 10³ gallons.

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3 years ago

A giraffe's height is 5 meters 40 centimeters. <br><br> How tall is the giraffe in millimeters?

nika2105 [10]

Answer:

5400 mm

Step-by-step explanation:

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3 years ago

What is the probability of picking a 7 from a standard deck of 52 cards?

BARSIC [14]

Answer:

(c)- 4/13

Step-by-step explanation:

There are 4 types of cards in a ordinary deck clovers, diamands, hearts, and spades

each set has 1 seven each, so 4 sevens total.

Also, each type of card has 13 different cards in it

so, your answer is 4/13

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3 years ago

THE NUMBER 1-10 ARE IN A BAG, YOU TAKE 2 OUT WITHOUT REPLACEMENT. WHAT IS THE PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME

ehidna [41]

Answer:

1 / 18

Step-by-step explanation:

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME = Number of favorable outcome / Total number of outcomes

Favorable outcome = 1

Total number of outcome (1,2,3,4,5,6,7,8,9,10) = 10

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME = 1 / 10

PROBABILITY OF DRAWING AN EVEN NUMBER THE SECOND TIME = Number of favorable outcome / Total number of outcomes

Favorable outcome (2,4,6,8,10) = 5

Total number of outcomes (1,2,3,4,5,6,8,9,10) = 9

PROBABILITY OF DRAWING AN EVEN NUMBER THE SECOND TIME = 5/9

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME AND THEN DRAWING AN EVEN NUMBER = 1 / 10 * 5 / 9 = 1 / 18

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3 years ago

Trevor plans on buying a car. Four banks offer the annual interest rates shown.

mote1985 [20]

Solution

In order to find greatest to least number, we have to convert the given fractions into decimals.

3 $\frac{1}{10}$ % = 3 + 1/10 = 3 + 0.10 = 3.10%

3 $\frac{2}{5}$ % = 3 + 2/5 = 3 + 0.40 = 3.40%

3 $\frac{1}{4}$ %= 3 + 0.25 = 3.25%

3 $\frac{1}{3}$ % = 3 + 0.33 = 3.33%

Now we can easily, compare the numbers and write from greatest to least.

3.40%, 3.33%, 3.25%, 3.10%

Greatest to least = 3 2/5%, 3 1/3%3, 3 1/4%, 1/10%,

Thank you :)

8 0

4 years ago

Read 2 more answers