Question

Evaluate the expression given below.
-5 (3.15 - 21/20) + 7

Answer 1

in fraction form

Answer 2

To evaluate the expression \(-5 (3.15 - 21/20) + 7\), we will first simplify the expression inside the parentheses.

1. Calculate \(21/20\):
\[
21/20 = 1.05
\]

2. Now substitute this value back into the expression:
\[
3.15 - 1.05
\]

3. Perform the subtraction:
\[
3.15 - 1.05 = 2.10
\]

4. Now substitute back into the expression:
\[
-5 (2.10) + 7
\]

5. Multiply \(-5\) and \(2.10\):
\[
-5 \times 2.10 = -10.50
\]

6. Finally, add \(7\) to \(-10.50\):
\[
-10.50 + 7 = -3.50
\]

Thus, the value of the expression is \(\boxed{-3.50}\).

Answer 3

To express the result \(-3.50\) in fraction form, we first convert \(-3.50\) into a fraction.

1. We know that \(-3.50\) can be expressed as:
\[
-3.50 = -\frac{350}{100}
\]

2. We can simplify this fraction:
\[
-\frac{350 \div 50}{100 \div 50} = -\frac{7}{2}
\]

Therefore, \(-3.50\) in fraction form is \(\boxed{-\frac{7}{2}}\).