Portrait of confident male professor with arms crossed standing against chalkboard in classroom - Stock fotó és kép

Relaxed friendly male teacher in class leaning against a desk with his arms folded looking to the side of the frame with the chalkboard behind him

Close-up portrait of a mature balding man smiling wearing casual clothing and glasses, with a friendly expression in front of a gray wall

Portrait of smiling bald man at home background

Close up portrait of a middle-aged male teacher in glasses giving physics lessons standing in front of a metal retort stand used in an experiment

Mature balding man wearing casual clothing, looking up with arms crossed in a skeptical attitude and expression in front of a gray wall with copy-space

Portrait of happy smiling business man, isolated on white background

Portrait of confident businessman with arms crossed standing against gray wall

Portrait of confident bald young man advertising laptop

Grinning bearded teacher with happy expression wearing eyeglasses and brown shirt in front of blank chalkboard ready to write something in copy space

Portrait of a mature balding man with a friendly smile, wearing a casual clothing, in front of a gray wall

Middle-aged businessman wearing eye-glasses looking at the camera

Male teacher taking question in class pointing with his pen with look of concentration

Confident senior male teacher standing with folded arms in front of a blank green blackboard in the classroom

Smiling middle-aged businessman in glasses offering to shake hands to conclude a deal, in welcome or to seal a partnership, against a dark background

Confident middle-aged male teacher standing in front of a blank green chalkboard with folded arms looking at the camera with a friendly smile

Smiling thoughtful businessman wearing glasses standing with folded arms staring off to the side into the distance

Waist Up Portrait of Mature Businessman with Facial Hair Wearing Suit and Eyeglasses Smiling Confidently at Camera and Standing in Studio with Dark Gray Background with Copy Space

Cheerful middle aged handsome businessman with beard and bald head in business casual outfit in airy office space

Balding middle-aged Attentive businessman looking at camera