Question
If $\Delta$ is an operation on integers such that for integers a and b, $\text{a }\Delta\text{ b}=\text{a}-\text{b}-(-5)$. Find the values of: $(-7)\ \Delta\ 3$
✓
Answer
$\because\text{a }\Delta\text{ b}= \text{a}-\text{b}-(-5)$ $\therefore(-7)\ \Delta\ 3=(-7)-3-(-5)$ $= -7 - 3 + 5$ $= -(7 + 3) + 5$ $= -10 + 5$ $= -(10 - 5)$ $= -5$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
On a squared paper, sketch the a quadrilateral with both horizontal and vertical lines of symmetry. (Hint : It will be helpful if you first draw the lines of symmetry and then complete the figures.)
The following figure are drawn on a sheet of squared paper. Count the number of square enclosed by figure and find its area, taking the area square as $1cm^2$.
→Compare the following fractions using the symbol > or <: $\frac{2}{3}$ and $\frac{8}{12}$
→Write all factors of the following numbers: $60$
→The following fractions represent just three different numbers. Separate them in to three groups of equal fractions by changing to its simplest form: $\frac{12}{72}$
→Write all the integers between $0$ and $-7. ($Write them in the increasing order$.)$
→ Convert the following into a decimal:
$1\frac{4}{25}$
→$1\frac{4}{25}$
Find $72 – 90$
→Find the perimeter of the rectangle whose lengths and breadths are given below: $7\ cm, 5\ cm$
→Find the number of lines of symmetry of shape:
