Mathematics question(venn diagram) ; a final year maths student was given a project to identify which of 30 chemical substance contained the element iron, lead, and proporous in his project defence, he gave the following breakdown iron only (5), lead and phoporous (10), and the three elements (6), iron and lead (6), iron and proporous only (3). the number of substance that have only phoporous or only lead are equal assuming the elements are the only constituents; (a) how many substance have lead 0nly. (b) how many substance had at least two element

the square root of what number? if you add that, then someone will probably answer the question.

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752

“a term can be a signed number, a variable, or a constant multiplied by a + sign or j sign. in , the terms are 5x , 3y and 8. when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient.” i hope this you.