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2 years ago

How to evaluate (-2÷7)^2? Answer must be a fraction!!

Mathematics

1 answer:

Dvinal [7]2 years ago

8 0

Answer: 4/49

Step-by-step explanation:

I evaluated the solution and this what I got for my solution

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105°

Step-by-step explanation:

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3 years ago

The cost of 6 CDs are $12, $13, $20, $20, $12.50 and $18.50. What is the range?

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2 years ago

Two bowls and one cup weigh 800 grams. One bowl and two cups weigh 700 grams. Find the weight of the bowl and the cup

antoniya [11.8K]

Answer:

\large \boxed{\textbf{Bowl = 300 g; cup = 200 g}}

Step-by-step explanation:

Let b = the mass of a bowl

and c = the mass of a cup

We have two conditions:

$\begin{array}{lrcl}(1) &2b + c & = & 800\\(2) & b + 2c & = & 700\\\end{array}$

Calculations:

$\begin{array}{lrcll}(3) & 4b + 2c &= & 1600&\text{ Multiplied (1) by 2}\\& 3b & = & 900&\text{Subtracted (2) from (3)}\\(4) & b & = & \mathbf{300}&\text{Divided each side by 3}\\ & 600 + c & = & 800&\text{Substituted (4) into (2}\\ & c & = & \mathbf{200}\\\end{array}\\\text{The mass of a bowl is $\large \boxed{\textbf{300 g}}$ and that of a cup is $\large \boxed{\textbf{200 g}}$}$

Check:

$\begin{array}{rlcrl}2(300) + 200& =800 & & 300 + 2(200) & = 700\\600 + 200 & = 800& & 300 + 400 & = 700\\800 & = 800& & 700 & = 700\\\end{array}$

OK.

6 0

2 years ago

PLEASE HELP THIS IS DUE IN LIKE 5 MINS

Damm [24]

Answer:

-2.5

Solution:

-18.5/7.4=-2.5

7 0

2 years ago

How to evaluate (-2÷7)^2? Answer must be a fraction!! ​

How to evaluate (-2÷7)^2? Answer must be a fraction!!