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Marrrta [24]
2 years ago
13

Mary, Chau, and David have a total of $87 i their wallets. Marry has 9$ more than Chau. David has two times what Mary has. How m

uch do they have in each wallet?
Mathematics
1 answer:
Pavel [41]2 years ago
7 0

Answer:

Mary = 24

Chau = 15

David = 48

Step-by-step explanation:

The formula is

Mary + Chau + David = 87

And we know that

Chau = Mary - 9

David = Mary * 2

So when we fill this in

Mary + Mary - 9 + Mary * 2 = 87

4Mary - 9 = 87

4Mary = 96

Mary = 24

Chau = Mary - 9 = 15

David = Mary * 2 = 48

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A person owns two shops. this year the telephone bill for the first job was $640 less than four times a telephone bill for the s
KIM [24]

Answer: F=bill for first shop=4S-$630; S=bill for second shop

.

F+S=$3265 Substitute for F

4S-$630+S=$3265

5S=$3895

S=$779 ANSWER 1: The bill for the second shop was $779

.

F=4S-$630

F=4($779)-$630

F=$3116-$630=$2486 ANSWER 2: The bill for the first shop was $2486.

.

CHECK:

F+S=$3265

$2486+$779=$3265

$3265=$3265

explanation:

5 0
3 years ago
Determine whether the following possible responses should be classified as nominal, ordinal, interval or ratio scale. Would your
anygoal [31]

Answer:

Nominal, Ordinal, interval or Ratio scale, Nominal.

Step-by-step explanation:

In Statistics, we can assort qualitative variables as nominal, for non-numerical values (Good, Yes, Man, Woman, Excellent, Tall, etc.). For numerical ones, we can rank them orderly, id est, ordinal (1st, 2nd, 3rd, 4th, etc.). Moreover, we can also categorize some numerical variables as an interval or ratio scale (90º F, 6' 2'' etc.).

Examining each one:

1. Would your overall rating of this tour be excellent, good, fair, or poor? <u>Nominal. </u>

These are not numerical. These are qualitative classification.

2. How many escorted vacations have you taken prior to this one?

<u>Ordinal</u>. The 1st, 2nd, 3rd, etc.

3. What is the current temperature outside? <u>Interval or Ratio Scale</u>

This is a classic Interval classification example. Since the temperature is graded in intervals then this an Interval.

4. Do you feel that the stay in New York was sufficiently long? Nominal.

Another non-numerical classification

3 0
3 years ago
The area of a triangle is found using the formula: A=½bh
labwork [276]
It would be 12

3*8=24 then divide that by 2 which is 12
5 0
3 years ago
What 2+2 pls hep meeeeeeeeee
Brrunno [24]

Answer:

2+2 is 4

Step-by-step explanation:

-1 is 3 quick maths

5 0
3 years ago
Read 2 more answers
80% is 50 of what number
Nostrana [21]

Answer:

62.5

Step-by-step explanation:

Let unknown number be represented as X

80/100 ×X=50

80X/100=50 cross multiply

80X=5000 divide both side by 80

X=62.5

The number is 62.5

3 0
3 years ago
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