Marco delivers newspapers on the weekend. He delivers \( s \) newspapers on Saturday and \( 4 s \) newspapers on Sunday. He earns \( \$ 0.15 \) for each paper he delivers. a. Write an expression for the total amount of money Marco earns each weekend.

60 Développer et réduire les expressions suivantes. a) \( (x+7)^{2}+2 x+4 \) b) \( -3(x-4)^{2}+11 \) c) \( (2 x-5)(2 x+5)-(3 x+5)^{2} \) d) \( (x-1)^{2}(x+2) \)

Multiple Choice 1 point Which of these is NOT caused by a Coronavirus? MERS COVID-19 The common flu SARS

2. \( 27^{1-x}=\frac{1}{81} \)

Ưna pirâmide reta possui como base um quadrado cujo lado mede \( 6 \sqrt{ } 2 \mathrm{~cm} \). Se a sua altura è 10 cm , então o seu volume, em \( \mathrm{cm}^{2} \), é de: A) 240 B) 340 C) 480 D) 500 E) 720

a. \( 25 a^{2}+54 a b+49 b^{2} \)