In both these chapters look at how Paul refers to the prophets, Moses and the scriptures in general in his witness about faith in Jesus Christ. Remember that the Old Testament is all about Jesus.
In this short section see how many times this is true.
Rom 10:8 But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
Rom 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
Rom 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
Rom 10:11 For the scripture saith, Whosoever believeth on him shall not be ashamed.
Rom 10:12 For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.
Rom 10:13 For whosoever shall call upon the name of the Lord shall be saved.
Rom 10:14 How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
Rom 10:15 And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
Rom 10:16 But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?
Rom 10:17 So then faith cometh by hearing, and hearing by the word of God.