1,000/40= 25 calculators
1,000/40.30=24.8
she can only buy 24 calculators all together
Well, the ratio of area is (Ratio of length)^2. So we work backwards.
<span>ROL = [sqrt] 4:9 </span>
<span>= 2:3 </span>
<span>and its the same for height, because height is a length. </span>
<span>NB: Ratio of volume = (Ratio of length)^3</span>
Paul's age = 6 years + Corinne's age
<span>(Paul's age - 10 years) = 3 times (Corinne's age - 10 years) </span>
<span>Let's rewrite it so it's cleaner: </span>
<span>P = 6 + C </span>
<span>P - 10 = 3(C - 10) </span>
<span>Question is P = ? years. </span>
<span>P = ? = 6 + C </span>
<span>We need to know what C is... the second equation can tell us: </span>
<span>P - 10 = 3C - 30 </span>
<span>P + 20 = 3C </span>
<span>P/3 + 20/3 = C </span>
<span>So now we know what C is... we can replace it into the first equation: </span>
<span>P = 6 + [P/3 + 20/3] </span>
<span>we just need to simplify now... it's easiest to get rid of the fractions first: </span>
<span>3P = 18 + P + 20 </span>
<span>2P = 38 </span>
<span>P = 19 </span>
<span>Answer is Paul's age is now 19 years.</span>
Answer: x = - 12
8x + 45 = 10x + 69
⇔ 10x - 8x = 45 - 69
⇔ 2x = -24
⇔ x = -12
Step-by-step explanation:
Answer:1. -117:125
2.4:3
3.3116:3125
Step-by-step explanation:
