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spin [16.1K]
3 years ago
7

Select all the expressions that equal -1-(-7) A. 1-7 B. 7-1 C. 1+7 D. -1+7

Mathematics
1 answer:
bulgar [2K]3 years ago
7 0
The answer is D. Because the negatives cancel out and equal a positive. therefore -1-(-7) =-1+7
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A rectangular fish tank has a base that is 3 inches
chubhunter [2.5K]

Answer:

Volume of rectangle = 105 inches³

Step-by-step explanation:

<u>Given the following data;</u>

Length, L = 3 inches

Width, W = 7 inches

Depth, D = 5 inches

To find the quantity of water it will take;

Volume \; of \; rectangle = length * width * depth

Substituting into the equation, we have;

Volume \; of \; rectangle = 3 * 7 * 5

<em>Volume of rectangle = 105 cubic inches.</em>

<em>Therefore, the quantity (amount) of water will it take to fill the tank to a depth of 5 inches is 105 cubic inches. </em>

3 0
3 years ago
From a standard deck of cards, a 5-card hand is dealt. Calculate the number of hands that contain 4 diamonds and 1 black king
rjkz [21]

Answer:

1430

Step-by-step explanation:

Given that a standard deck of cards is 52 cards, we have 13 Diamonds and we need 4 diamonds.

Hence, we have 13C4.

Also, we have 4 kings in a standard deck of cards, and in which we have 2 black kings but we need 1 king.

Hence we have a 2C1

Therefore:

13C4 * 2C1

=> 13! ÷ [4! (13 - 4)!] * 2! ÷ [1! (2-1)!]

=> 13! ÷ [4! (9)!]

=> (1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13) ÷ [(1 x 2 x 3 x 4) (1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9)]

=> (10 x 11 x 12 x 13) ÷ 24

=> (17160 ÷ 24) * (24 ÷ 6)

=> 715

2! ÷ [1! (2-1)!]

=> 2

Hence, we have 715 * 2

=> 1430

Hence, in this case, the correct answer to the question is 1430

7 0
3 years ago
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krek1111 [17]

Answer:

Step-by-step explanation:

the way i do it is simple

7:45 +15m=8:00

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in total we have 16hours and 15 minutes

8 0
3 years ago
Read 2 more answers
Which theorems or postulates could be used to show ABC =ECD
Kamila [148]

Answer:

?

Step-by-step explanation:

3 0
3 years ago
What is the standard form equation of 4x+7¥=11
yaroslaw [1]

This equation is in standard from unless you mean vertex standard form?  

5 0
3 years ago
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