Answer:
1
Step-by-step explanation:
12+[2-(4 × a²)] ÷ 7+b
= 12+[2-(4 × 5²)] ÷ 7+ 1
= 12+[2-(4 × 25)] ÷ 7+ 1
= 12 + (2 - 100)÷ 7 + 1
= 12 - 98 ÷ 7 + 1
= 12 - 14 + 1
= 1
Step-by-step explanation:
<em>(-2)-(+15)=(-17)</em>
<em>the</em><em> </em><em>diffe</em><em>rence</em><em> </em><em>between</em><em> </em><em>those</em><em> </em><em>two</em><em> </em><em>temp</em><em>erature</em><em> </em><em>s</em><em> </em><em>is</em><em> </em><em>(</em><em>-</em><em>1</em><em>7</em><em>)</em>
Based on the given fractions above which are 7/8 and 42/4, in order for us to know if they are both proportional is to do the cross multiplication. Let's say, we multiply 4 by 7 and we get 28. Divide 28 by 8 and the result is 3.5 and not 42. Therefore, we can say that these fractions are NOT proportional. Hope this helps.
