sat-dog

Choice D is correct. Let $p$ represent the number of pounds of potatoes and let $c$ represent the number of pounds of celery that Davio bought. It’s given that potatoes cost $\$0.69$ per pound and celery costs $\$0.99$ per pound. If Davio spent $\$5.34$ in total, then the equation $0.69p+0.99c=5.34$ represents this situation. It’s also given that Davio bought twice as many pounds of celery as pounds of potatoes; therefore, $c=2p$. Substituting $2p$ for $c$ in the equation $0.69p+0.99c=5.34$ yields $0.69p+0.99\left(2p\right)=5.34$, which is equivalent to $0.69p+1.98p=5.34$, or $2.67p=5.34$. Dividing both sides of this equation by $2.67$ yields $p=2$. Substituting $2$ for $p$ in the equation $c=2p$ yields $c=2\left(2\right)$, or $c=4$. Therefore, Davio bought $4$ pounds of celery.

Choice A is incorrect. This is the number of pounds of potatoes, not the number of pounds of celery, Davio bought.

Choice B is incorrect and may result from conceptual or calculation errors.

Choice C is incorrect and may result from conceptual or calculation errors.